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- Denis Welch
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1 presentation contents page presentation protection functional and connection schemes other connection schemes connection characteristics 9 installation 0 commissioning ordering information Sepam 00 is a group of modules that may be used: individually to perform a function, in combination with Sepam 000 or Sepam 000. Each module has been designed to perform a complete function. It includes all the elements required, such as: sensor interface, tripping output relays, annunciation, settings, connections. application Sepam 00 LA is used as the main protection system in substations which do not have an auxiliary power supply source. Combined with a Sepam 000 or Sepam 000, it provides back-up protection for the substation incomers. This protection goes into effect when the main protection chain fails due to: power supply fault, wiring fault, trip unit fault, shutdown of Sepam 000 or Sepam 000. Sepam 00 LA. advantages protection against low-value phase and earth faults, self-powering: Sepam 00 LA is powered by the current sensors, may be put in disabled status (inactive output) via an external inhibition contact, tripping by a low power-consuming «MITOP» trip unit (). high level of immunity to electromagnetic disturbances. () MITOP: Merlin Gerin circuit breakers may be equipped with this type of trip unit upon request.
2 description The front face of Sepam 00 LA contains the instruments needed for the phase and earth protection settings. Each set of microswitches, marked K, K, K and K and associated potentiometer P, P, P, P should be positioned according to the desired setting. K CTA CTA 0, 9,,, CT A CT A K 0 microswitch set to 0. K 0 microswitch set to. t - - 0, 0, 0, 0,0 t P K (ms) P K CTA CTA - - 0, 0, 0, 0, 0 0 P x x Io> ) K (ms) P x x, 0 +0 ms I> I> = In ) 0 +0 ms K x P N N Io> = K x P In Setting example: CT = 00/, K =, P =. and N =. using the formula: I> = x. In I> =., I> = 0A primary In The microswitch is fitted with a potentiometer that the user turns to adjust the setting. Potentiometer turned fully to left = minimum setting, to right = maximum setting. setting increases as potentiometer is turned to right sepam 00 S0 LA Front face displaying the setting instruments.
3 protection Sepam 00 LA provides sorts of protection: phase overcurrent (ANSI 0/): protection of equipment against phase-tophase faults (- or -phase), earth fault (ANSI 0N/N): protection of equipment against earth faults in directly earthed or impedance earthed networks. This sort of protection is appropriate for current transformers: A secondary (CT A), A secondary (CT A). phase protection setting range set point time delay. to In on A CT 00 to 00 ms 0. to In on A CT 00 to 00 ms accuracy ± % ± 0% Setting includes: making a number of turns around the interposing ring CT primary, positioning microswitches K (), fine tuning using the potentiometer: min to max. Phase current setting (multiple of In) TC A position of K in front face () Wiring of turns on the interposing ring CT (e.g. turns). number position of P potentiometer of turns min max min max min max min max min max min max CT A position of K in front face () number position of P potentiometer of turns min max min max min max min max min max min max earth protection setting range set point time delay 0. to. In on A CT 00 to 00 ms 0.0 to 0. In on A CT 00 to 00 ms accuracy ± % ± 0% Setting includes: positioning microswitch K (), fine tuning using the potentiometer: min to max. Earth fault current settings (multiple of In) () If all the microswitches are set to 0, the protection will be inhibited. Only one microswitch in the group should be set to. The potentiometer associated to the microswitch allows a tunning of the setting value: minimum setting (x): turned fully to left, maximum setting (x.): turned fully to right. position of K on front face () position of P potentiometer min max min max min max min max CT A CT A
4 time delays 00 to 00 ms with definite time. Setting includes: positioning microswitch K (phase protection), K (earth protection) (), fine tuning using the potentiometer: 0 to + 0 ms. Time delay setting (ms) position of K or K () position of P or P potentiometer min max min max min max min max min max min max The duration of the time delay includes MITOP trip unit tripping time. current sensors The current transformers should be sized so as not to saturate at the setting, taking into consideration Sepam 00 LA's input impedances: phase input: 0.0 Ω, earth input: 0.0 Ω, (i.e. 0. Ω for phase + earth protection). In practice, a. VA, 0P, A secondary type transformer is appropriate. The current transformer windings should be coiled round a separate magnetic coil and must not supply power to any circuits other than the Sepam 00 LA's circuit. interposing ring CT choice protection CT A CT A phase ACE 9 ACE 9 phase + earth ACE 9 ACE 9 () If all the microswitches are set to 0, the protection will be inhibited. Only one microswitch in the group should be set to. The potentiometer associated to the microswitch allows a tunning of the setting value: minimum setting (+0ms): turned fully to left, maximum setting (+0ms): turned fully to right.
5 functional and connection scheme phase and earth protection L L L ACE 9 P P S S 0 A ECM 0 0N N 9 0 A DPC 0 A A circuit breaker () MITOP trip unit blue (-) red (+) Sepam 000 or Sepam 000 watchdog contact Arrangement with phase CTs. It is mandatory to use the ACE 9 interposing ring CT. () the linking between Sepam 00 LA and the MITOP mustn t be bigger than Ω.
6 other connection schemes phase protection The following arrangement is used for phase protection: or phase CTs, ACE 9 interposing ring CT for A or A CT. P P S S ACE 9 0 A ECM phase CT arrangement. A DPC 0 A A phase and earth protection The following arrangement can be used for earth protection: or phase CTs, a current transformer on the earthing connection. For A CTs: ACE 9 inteposing ring CT. For A CTs: ACE 9 interposing ring CT. P P S S ACE 9 or ACE 9 0 A ECM 9 0 A DPC 0 A A P P S S phase CT arrangement, and residual current on ground connection.
7 connection Sepam 00 LA A A -pin CCA connector, screw terminal cabling with cables 0. to. mm max., each terminal capable of receiving two. mm cables. A A 0 9 phase current phase current phase current residual current 0 9 MITOP 9 inhibition earthing terminal on right side face. Rear view. Terminal identification Each terminal is identified by characters. board slot number connector identification letter connector terminal number ( to ) A interposing ring CT phase current () phase current () phase current () () the connection is made directly without any intermediary terminal block on the interposing ring CT. Make the required number of turns. 9 0 input residual current phase phase phase output residual current N.B. The ACE 9 interposing ring CT does not have a residual current circuit. ACE 9/ACE 9 interposing ring CT connection scheme.
8 characteristics environmental characteristics climatic operation IEC - - C to C storage IEC - - C to 0 C damp heat IEC - 9% to 0 C mechanical degree of protection IEC 9 IP front face vibrations IEC -- class I shocks IEC -- class I fire NFC 0 glow wire electromagnetic radiation IEC -- class x 0 V/m electrostatic discharge IEC -- class III electrical./0 µs impulse wave withstand IEC - () kv damped MHz wave IEC -- class III ns fast transients IEC -- class IV energetic transients IEC 0- () () printed in 9 and amended in 99. () pending. marking on our product guarantees their conformity to European directives. 9
9 installation dimensions and weights Sepam 00 mounting latch Cut-out 0 0 max. 0 max. e = mm max weight:. kg. mounting details Interposing ring CTs phases ACE 9 (A or A CT). phases and earth ACE 9 (A CT), ACE 9 (A CT) DIN rail mounting weight Kg 0 0 weight. Kg Connection By. mm clip, max. wire cross-section. mm. 0
10 commissioning CT A CT A I> = In 0 K x P N N Example of identification. phase protection make the required number of turns on the ACE 9/9/9 interposing ring CT, as indicated in the chart (page ) (the number of possible turns may be limited by the cross section of the wire: max.. mm for turns). Make a note of the following on the front face: v type of current sensor, or A (e.g. CT A) v number of turns made (e.g. ). set microswitch K on the front face to the desired set point (fine tuning potentiometer P turned fully to the minimum setting on the left). Only microswitch among the available should be set to (for miminum time delay setting, microswitch K should be set to and the corresponding potentiometer P turned fully to the left). inject the set point current and turn the potentiometer until the MITOP trips, after having shorted the earth matching transformer for the duration of testing. Set the time delay to the desired value using microswitch K and the related potentiometer P. earth protection set microswitch K on front face (fine tuning potentiometer P turned fully to the minimum setting on the left). Only microswitch among the available should be set to (for miminum time delay setting, microswitch K should be set to and the corresponding potentiometer P turned fully to the left). inject the set point current and turn the potentiometer until the MITOP trips set the time delay to the desired value using microswitch K and the related potentiometer P.
11 Ordering information Sepam 00 LA () quantity Phase interposing ring CT ACE 9 ()... Phase + earth interposing CT ACE 9 () (A secondary)... ACE 9 () (A secondary)... () Sepam 00 LA does not include supply of the MITOP trip unit which should be provided with the circuit breaker. () With Sepam 00 LA, it is mandatory to choose the type of protection and the type of current transformer secondary. Schneider Electric SA postal address F - 00 Grenoble cedex 9 tel : 0 0 telex : merge 0 F As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. This document has been printed on ecological paper. Publishing: Schneider Electric SA Design, production: Idra Printing: AC099/E ART. 0 / 99
12 Protection and control Sepam range Sepam 00 RT
13 presentation contents page presentation connection characteristics installation ordering information Sepam 00 RT. on in in in in in out Sepam 00 is a group of modules that may be used: individually to perform a function, in combination with Sepam 000 or 000. Each module has been designed to perform a complete function. It includes all the elements required, such as: tripping output relays, annunciation, connections. applications Sepam 00 RT Specially designed for transformer protection applications, offering a combination of DGPT or Buchholz plus thermostat information. advantages Simple to use: three "tripping" inputs, two "alarm" inputs with the possibility of individual "tripping" input parameter setting, electrically latched inputs, a "tripping" output with high breaking capacity linked with two other outputs: "inhibit closing" and "annunciation", two "alarm signal" outputs linked with the two "alarm" inputs, local or remote acknowledgment, integrated "lamp test". Clear information display of "tripping" input and output status on the front of the device. Dependable operation high level of immunity to electromagnetic disturbances: Sepam 00 RT is designed to operate safely in the highly disturbed electromagnetic environments of HT substations. description The front of Sepam 00 RT includes: indicator lamps: device "on" indicator, "In" to "In" indicators: electrically latched indicators which store the activated status of each of the 'tripping" inputs, "In" and "In" indicators: electrically latched indicators which store the activated status of the "alarm" inputs and indicate the status of the "alarm " and "alarm " output relays, "out" indicators: latching indicator which shows switching of the "tripping" output relay. a "reset" pushbutton: for acknowledgment of the relay outputs and associated display when the inputs return to their normal position. While activated, this pushbutton may be used for a lamp test of the indicators on the front of the device. The back of Sepam 00 RT includes: input/output connectors: a -pin connector for the "alarm" inputs and outputs, an -pin connector for the "tripping" output and for the power supply, a -pin connector for the "power ON" output. Sepam 00 RT has: common-point logic inputs, named "In" to "In", an isolated remote "reset" input, a -contact "tripping" output relay ( normally open contacts and normally closed contact), "alarm" relays (changeover contacts), a "power ON" relay ( normally open contact and normally closed contact). Sepam 00 RT operates in ranges of supply voltage (please specify when ordering): -0 V DC ±0%, - V DC ±0%, 0-0 V DC -0% +0%. reset sepam 00 S0 RT Front of device with display and control of acknowledgement/lamp test..
14 parameter setting The parameters of the "alarm" inputs made be set so as to make them "tripping" inputs. "Alarm" inputs In and In may be set individually as "tripping" inputs. The choice is made via two microswitches that are accessible on the left-hand side of Sepam 00 RT. Access to the microswitches is closed off by a removable plastic cover. The plastic cover should be replaced after the setting has been made. Access to and identification of microswitches SA- and SA-. SA- SA- Parameter setting "Alarm" position. Move the microswitch tab to the left. "Tripping" position Move the microswitch tab to the right. functional and connection diagram com In In 0 0 A S R SA - In O O 0 A alarm output alarm output "alarm" inputs In S R SA - In In S R In In S R In "tripping" inputs reset 0 reset PB + aux. sup. - A S R on In out A O O O O B tripping outputs power on output
15 connection Sepam 00 RT A -pin CCA 0 connector (power supply and "tripping" outputs), screw terminal wiring with wires 0. to. mm max. Each terminal capable of receiving two. mm wires. 0 A -pin CCA connector ("alarm" inputs and outputs), screw terminal wiring with wires 0. to. mm max., each terminal capable of receiving two. mm wires. A AS 0 A A RT B CCA 0 connector (power ON), screw terminal wiring for wires 0. to. mm max. Each terminal capable of receiving two. mm wires. 0 9 O O O O A B tripping annunciation inhibit closing + aux supply power on output A reset inputs In In In In In common alarm output alarm output B B P + A B -0VDC -VDC 0-0VDC 0-0VAC 00-VAC 0 9 A 0-0VAC -0VDC -VDC 0-0VDC 00-VAC earthing terminal Terminal identification Each terminal is identified by characters. A board slot number (0 to ) connector identification letter (A or B) connector terminal number
16 Example of input wiring (transformer protection) -C +C remote reset 0 A 0 A 0 SEPAM 00 RT reset thermostat (tripping) buchholz (tripping) thermostat (alarm) buchholz (alarm) A A A A A A 0 In In In In In Com A A + - power Example of circuit breaker control output contact wiring +C on off A A A Sepam 00 RT A A A M CLOSE TRIP C
17 characteristics electrical characteristics logic inputs /0 Vdc / Vdc 0/0 Vdc power consumption 0 ma ma ma typical filtering time logic outputs (relays) ms breaking capacity () /0 Vdc Vdc Vdc 0/0 Vdc contact O A A 0. A 0. A contacts O to O. A A 0. A 0. A making capacity permissible steady state current A A number of operations under full load response time typical ms (inputs to outputs) max. ms power supply range typical maxi inrush current consumption consumption /0 Vdc ± 0%. W, W < 0 A during 0 ms / Vdc ± 0%. W. W < 0 A during 0 ms 0/0 Vdc - 0%, + 0% W 9 W < 0 A during 0 ms environmental characteristics climatic operation IEC - -0 C to +0 C storage IEC - - C to +0 C damp heat IEC - 9% to 0 C mechanical degree of protection IEC 9 IP on front vibrations IEC --- class I shocks IEC -- class I seismic tests IEC -- class I fire NFC 0 glow wire dielectric power frequency IEC - () kv - min../0 µs impulse wave resistance IEC - kv electromagnetic radiation IEC -- class x 0 V/m electrostatic discharge IEC -- class III damped MHz wave IEC -- class III ns fast transients IEC -- class IV () published in 9 and amended in 99. marking on our product guarantees their conformity to European directives.
18 installation dimensions and weight Sepam 00 mounting latch cut-out 0 0 A max 0 max e = mm max weight: kg. mounting details A
19 Ordering information Sepam 00 S0 RT quantity:... auxiliary power supply: to 0 Vdc... to Vdc... 0 to 0 Vdc... Schneider Electric SA postale address F-00 Grenoble cedex 9 tel: () telex: merge 0 F As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. This document has been printed on ecological paper. AC000/EN ART. Publishing: Schneider Electric SA Design, production: Idra Printing: / 99
20 Protection diagnosis monitoring Sepam 00 MI mimic diagram and local control
21 presentation contents page presentation block and connection diagrams characteristics installation 9 ordering information Sepam 00 MI is a group of modules which may be used: c individually to perform a function, c in combination with Sepam 000 or 000. Each module is designed to provide a complete function. It includes all the required components, such as: c device position indication inputs, c circuit breaker opening or closing control outputs, c isolation control outputs (according to version), c local or remote control changeover switch (according to mimic diagram version), c connectors. application Sepam 00 MI is designed for use in control cubicles or cabinets. Sepam MI provides the required indication and local control components. advantages c includes all the animated mimic diagram components for display of the status of breaking and isolation devices, c reduced cabling, c standardization and consistency with the Sepam range. Example: indication and control for incomer or feeder circuit breaker. Sepam 00 MI
22 description The front of Sepam 00 MI includes the following (according to type): c red and green indicator units used to make up mimic diagrams representing the cubicle electrical diagram: v a red vertical bar representing "device closed", v a green horizontal bar representing "device open". c a local or remote control selector switch (CLR), c a circuit breaker open control pushbutton (KD), active in local or remote mode, c a circuit breaker close control pushbutton (KD), active only in local position. The back of Sepam 00 MI includes a - pin connector for indication and power supply inputs and control outputs. Sepam 00 MI can operate with ranges of power supply (to be indicated when ordering): c /0 V AC/DC, c / V AC/DC. Device closed. Device open. Mimic diagrams I I I I O O O O local local local local remote remote remote remote Sepam 00 S0 MI-X0. Sepam 00 S0 MI-X. Sepam 00 S0 MI-X0. Sepam 00 S0 MI-X0. Sepam 00 MI
23 block and connection diagrams LV LR alim. 0 9 LV LR LV LR 0 9 LV LR Sepam 00 S0 MI-X00. LV KD I O KD LR LR LV DC supply 0 9 AC/DC LV LR LV LR remote CLR local KD KD common remote Sepam control enable CB closing CB tripping common 0 9 local remote CLR Sepam 00 S0 MI-X0. Sepam 00 MI
24 LV KD I O KD LR LV LR DC supply 0 9 AC/DC LV LR remote CLR local KD common remote Sepam control enable CB closing LV LR LV LR KD CB tripping common 0 local 9 LV LR remote CLR Sepam 00 S0 MI-X0. KD I O KD KS KS LV LR LV LR LV LR DC supply 0 9 AC/DC LV LR LV LR remote CLR local KD KD common remote Sepam control enable CB closing CB tripping common local 0 9 LV LR KS plug in control CLR remote KS plug out control Sepam 00 S0 MI-X0. Sepam 00 MI
25 block and connection diagrams (cont'd) KD I O KD LV LV LR LV LR LR DC supply 0 9 AC/DC LV LR LV LR remote CLR local KD common remote Sepam control enable CB closing LV LR KD CB tripping common 0 local 9 remote CLR Sepam 00 S0 MI-X. KD I O KD LV LV LR LV LR LR DC supply 0 9 AC/DC LV LR LV LR remote CLR local KD common remote Sepam control enable CB closing LV LR KD CB tripping common 0 9 local remote CLR Sepam 00 S0 MI-X. Sepam 00 MI
26 LV LR KD I O KD LV LV LR LV LR LR DC supply 0 9 AC/DC LV LR LV LR LV LR remote CLR local KD KD common remote Sepam control enable CB closing CB tripping common 0 local 9 LV LR remote CLR Sepam 00 S0 MI-X. LV KD I O KD LV LR LV LR LR DC supply 0 9 AC/DC LV LR LV LR remote CLR local KD common remote Sepam control enable CB closing LV LR KD CB tripping common 0 9 local remote CLR Sepam 00 S0 MI-X0. Sepam 00 MI
27 characteristics electrical characteristics logic inputs voltage /0 V / V max. consumption per input ma ma logic outputs (relays) voltage /0 V / V permissible rated current breaking capacity: DC resistive load A 0. A A AC resistive load A A number of on-load operations power supply auxiliary power source to 0 V 0% +0% DC or AC current to V 0% +0% (0 or 0 Hz) consumption to 0 V:. VA max. (at V) V: VA 0 V: VA environmental characteristics climatic operation IEC - -0 C to +0 C storage IEC - - C to +0 C damp heat IEC - 9% to 0 C mechanical degree of protection IEC 9 IP on front vibrations IEC --- class I shocks IEC -- class I seismic tests IEC -- class I fire NFC 0 glow wire dielectric power frequency IEC - () kv - min../0 µs impulse wave resistance IEC - kv electromagnetic radiation IEC -- class x 0 V/m electrostatic discharge IEC -- class III damped MHz wave IEC -- class III ns fast transients IEC -- class IV () published in 9 and amended in 99. marking on our product guarantees their conformity to European directives. Sepam 00 MI
28 installation dimensions and weights Cut-out mounting latch 0 0 maxi. Mounting close-up maxi. e = mm max weight: 0.0 kg Sepam 00 MI 9
29 notes 0 Sepam 00 MI
30 notes Sepam 00 MI
31 ordering information When ordering, please enclose a photocopy of this page with your order, filling in the requested quantities in the spaces provided. Sepam 00 MI Sepam type ()... quantity... () example : S0 MI - X00 Power supply voltage /0 V ac/dc... / V ac/dc... Schneider Electric SA postal address F - 00 Grenoble cedex 9 tel: () 0 0 telex : merge 0 F As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. this document has been printed on ecological paper. Publishing: Schneider Electric SA Design, production: Idra Printing: AC0/EN ART. 0 / 99
32 Protection and control Sepam range Sepam 00 LD High impedance differential protection
33 presentation contents page presentation protection specifying the sensors surge limiter connections characteristics 9 installation 0 ordering information on trip % In reset Sepam 00 is a group of modules that may be used: c separately to perform a function, c in combination with Sepam 000 or 000. Each module has been designed to perform a complete function. It includes all the elements required, such as: c tripping output relays, c annunciation, settings, c connections. applications Sepam 00 LD is a high impedance differential relay. It provides restricted earth fault, busbar and machine protection. advantages c stability with respect to external faults, c sensitivity to internal faults, c speed (typical response time: ms to x Is), c outputs with or without latching, c local and remote acknowledgment, c high level of immunity to electromagnetic interference. description Sepam 00 LD comes in versions: c single-phase for restricted earth protection, c three-phase for busbar and machine protection. c 0 or 0 Hz 0 Hz single-phase: 00 LD X 0 Hz three-phase: 00 LD X 0 Hz single-phase: 00 LD X 0 Hz three-phase: 00 LD X The front of Sepam 00 LD includes: c signal lamps: v power on indicator, v latching trip indicator indicating output relay tripping, c protection setting dial, c reset button for acknowledging output relays and the trip indicator. When the button is activated, the trip indicator undergoes a lamp test. The back of Sepam 00 LD includes: c input/output connectors: v an -pin connector for toroid inputs and remote acknowledgment, v an -pin connector for tripping outputs and power supply, v a -pin connector for tripping outputs, c a microswitch used to configure the relay with or without latching. Sepam 00 LD has: c or current inputs with a common point according to whether it is a single-phase or three-phase version, c a logic input (isolated) for remote acknowledgment, c tripping output relay with contacts ( normally open contacts and normally closed contacts). Sepam 00 LD operates in voltage ranges (please specify when ordering): c -0 Vdc, c - Vdc, c 0-0 Vdc, c 00- Vac, c 0-0 Vac. Sepam 00 LD is associated with a stabilization plate (or plates) with variable resistance, enabling operation with A or A transformers. sepam 00 S0 LD Sepam 00 LD
34 protection operation - setting curve t (ms) l/ls settings () setting values setting current Is to 0 % In by steps of % In 0 to 0 % In by steps of 0 % In stabilizing resistor plate Rs = 0 Ω to Ω P = 0 W Rs = 0 Ω to 0 Ω P = 0 W Rs = 0 Ω to 0 Ω P = 0 W Rs = 0 Ω to 0 Ω P = 0 W Rs = 0 Ω to 0 Ω P = 0 W accuracy / performance setting ± % pickup (%) 9% ± % response time i 0 ms for I u 0 x Is i ms for I u x Is i ms for I u x Is memory time () The dial on the front of the device is used for setting. i 0 ms parameter setting Microswitch SW, accesible on the back of Sepam 00 LD, is used to choose with or without latching. without latching: SW with latching: SW Sepam 00 LD
35 specifying the sensors To ensure the stability and sensitivity of Sepam 00 LD, the stabilization resistor and characteristics of the CTs are calculated as follows. n: CT transformation ratio p : Number of CTs Rf, Rf: Wiring resistance on either side of Rs Rf = max (Rf, Rf) R, Rp: CT secondary resistances Rs : Rl: isc: CT R is : if: i m, i m p: Vk, Vkp: Rf protected zone Rf 00 LD R = max (R, Rp) Stabilizing resistor Surge limiter Maximum external short-circuit current in CT secondary winding Protection setting (A) Current in Rl CT magnetizing currents CT knee-point voltages Vk = min (Vk, Vkp) Choice of current transformers c all the CTs must have the same transformation ratio n. c the knee-point voltages are chosen so that: Vk > x (R + Rf) x isc Choice of stabilizing resistor R + Rf is RI x isc < Rs i Vk x is Rs CT R Surge limiter The approximate voltage developed by a CT in the event of an internal fault is: V = rx Vk x (isc x (R + Rf + Rs) - Vk) If the value exceeds kv, it is necessary to add an Rl surge limiter in parallel with the relay and stabilizing resistor in order to protect the CTs.(see: surge limiter). Protection sensitivity The CTs consume magnetizing current and the surge limiter, when installed, creates fault current. The minimum residual primary current detected by the protection is therefore: Id = n x (i m + i m p + if + is) with v i m, i m p are read on the CT magnetization curves at V = Rs x is. v if is the total earth leakage current of the surge limiter for Vs = Rs x is, i.e. the sum of the earth leakage currents of the N limiter units installed in parallel: if = N x ib (see: surge limiter). Example Restricted earth (single-phase relay) Isc primary = ka n: 00/ A R =. Ω CTs situated 0 m from the relays, connected by mm wiring (copper) ( x 0) Rf = 0,00 x = 0, Ω Number of sensors in parallel: (same) Setting: Is = 0% In, is = 0. A c CT knee-point voltage isc = 000/00 = 0 A (R + Rf) x isc = (. + 0.) x 0 = V Vk > x = V e.g.: Vk = 0 V. c stabilizing resistor 0. < Rs i 0 ( x 0.) 0 < Rs i 0 The resistance is adjustable from 0 to 0 Ω. It is set to 00 Ω. c surge limiter? V = rx 0 (0 ( ) - 0) V = V < kv It s not necessary to install a surge limiter in parallel. c minimum primary default current detected by the protection for V = Rs x is = 0 V The CT magnetization curve indicates im = 0 ma Id = 00 ( x ) = 9 A Example Busbar (-phase relay) switchboard with 0 cubicles incomer, feeder, without coupling isc = 0 ka n : 000/ A R =. Ω CTs situated m from the relays, connected by. mm wiring (copper): ( x ) Rf = 0.0 x = 0. Ω. Number of sensors in parallel: 0 (same) Setting: is = 0% In, is =. A c CT knee-point voltage isc = 0000 x /000 = A (R + Rf) x isc = (. + 0.) x = 0 V Vk > x 0 = 00 V e.g.: Vk = 0 V. c stabilizing resistor 0. < Rs i 0 ( x.) 0 Ω < Rs i Ω The resistance is adjustable from 0 to Ω. It is set to Ω. c surge limiter? V = r x 0 ( ( ) - 0) V = V > kv It s necessary to install a surge limiter in parallel. c minimum primary default current detected by the protection for V = Rs x is = 0 V The CT magnetization curve indicates im = 0 ma. The leakage current curve of the surge limiter indicates i l = ma. The number of surge limiters is: N = hence 0 Id = 000 (0 x x ) = 0 A Sepam 00 LD
36 surge limiter If the calculations have shown that it is necessary to install a surge limiter in parallel with the relay and Rs to protect the CTs, it is determined as follows. choice Standard references c the surge limiters on offer consist of limiter blocks which are independent of each other. Each block accepts a maximum current of 0 A rms for s. By installing the blocks in parallel, it is possible to obtain the appropriate limiter for the application. c there are two standard references: v a single module, comprising one block, v a triple module, comprising three independent blocks which are aligned. Calculation of the number of blocks per phase According to i, max. RMS short-circuit current in the secondary winding of a CT, the number of blocks required per phase is calculated: N I 0 c for a -phase relay, N triple modules should be ordered, c for a single-phase relay, N blocks, made up of triple and single modules. Examples c Examples and : Max. RMS short-circuit current in the primary winding of a CT with a ratio of 000: 0 ka. v calculation of the number of blocks per phase: 0000 N =. (000 x 0) Hence N = v modules to be ordered: triple modules for a -phase relay. single modules for a single-phase relay. c Example : Max. RMS short-circuit current in the primary winding of a CT with a ratio of 00: 0 ka. Single-phase relay. v calculation of the number of blocks per phase: 0000 N =, (00 x 0) Hence N = v modules to be ordered: triple module + single module to have blocks in all. earth leakage current c a limiter block accepts a max. steady state voltage of V rms and presents an earth fault current ib: 000 U (V ms) Ib (A rms) 0. Sepam 00 LD
37 functional and connection diagrams relay A phase phase phase remote reset PB reset 0A F0 F0 F0 0 % % SW without & S R with latching trip B annunciation and tripping outputs auxiliary power supply + - A on Only OA and OA terminals are available in the single-phase version. stabilization plate Connection of CTs and surge limiters: c A rating: between terminals - and -, c A rating: between terminals - and -. A CT A CT Rs CSH0: core balance CT Sepam 00 LD
38 connections Sepam 00 LD A : -pin CCA 0 connector (power supply and annunciation and tripping outputs); screw terminal wiring with 0. to. mm wires, each terminal being capable of receiving two. mm wires. B : CCA 0 connector ( annunciation outputs); screw terminal wiring with 0. to. mm wires, each terminal being capable of receiving two. mm wires A B tripping annunciation - auxiliary power + supply annunciation 0A : -pin CCA 0 connector (toroid and remote reloading inputs); screw terminal wiring with 0. to. mm wires, each terminal being capable of receiving two. mm wires. 0A Terminal identification. Each terminal is identified by characters. board slot number (0 to ) connector identification letter (A or B) connector terminal number : ground terminal remote reset phase input phase input phase input (single-phase) A A B 0 AS LD ~ ~ A SW stabilization plate CSH0 0A c items to : clamp screw connections for mm wire. c items, : secondary of CSH0 core balance CT, connected to 0A. Wire to be used: v sheathed, shielded wire, v min. cross-section 0.9 mm (AWG ) (max.. mm ) v resistance load per unit length < 00 mω/m v min. dielectric strength: 000 V v max. length: m. Connect the wire shielding in the shortest way possible to 0A. The shielding is grounded in Sepam 00 LD. Do not ground the wire by any other means. Press the wire against the metal frame of the cubicle to improve immunity to radiated interference. surge limiter c single unit = outputs with screw M0, c triple unit = outputs with holes ø 0, (see installation ). c example (N = blocks per phase): triple modules for a -phase relay. Rs Rs Rs 00 LD c example (N = blocks per phase): single modules for a single-phase relay. c example (N = blocks per phase): triple module + single module for a single-phase relay. Rs 00 LD Rs 00 LD Sepam 00 LD
39 connections (cont d) examples of applications Restriced earth protection (single-phase) - A CT plate 0A Sepam 00LD Busbar protection (-phase) - A CT - with surge limiters plate protected zone plate plate 0A Sepam 00LD Correspondence between primary and secondary connections (e.g. P, S) Sepam 00 LD
40 characteristics electrical characteristics analog inputs (with plate) constant current 0 In sec. current 00 In logic input (remote reset) voltage /0 Vdc /0 Vac maximum power consumption. W. VA logic outputs constant current A voltage /0 Vdc Vdc Vdc/Vac 0 Vdc/Vac breaking capacity (contact 0) resistive dc load A A 0. A 0. A resistive ac load A A breaking capacity (contacts 0 to 0) resistive dc load. A A 0. A 0. A resistive ac load A A power supply range consumption when inactive max. consumption inrush current /0 Vdc ±0 %. W W < 0 A for 0 ms / Vdc ±0 % W W < 0 A for 0 ms 0/0 Vdc -0 %, +0 % W W < 0 A for 0 ms 00/ Vac -0 % +0 % VA 0 VA < A for 0 ms 0/0 Vac -0 % +0 % VA VA < A for 0 ms operating frequency. to Hz environmental characteristics climatic operation IEC - - C to C storage IEC - - C to 0 C damp heat IEC - 9 % at 0 C influence of corrosion IEC - class I mechanical degree of protection IEC 9 IP on front vibrations IEC -- class I shocks and bumps IEC -- class I earthquakes IEC -- class I fire IEC 9-- glow wire electrical insulation power frequency IEC - kv - mn./ 0 us impulse wave IEC - kv electromagnetic compatibility immunity to radiation IEC -- class x 0 V/m electrostatic sicharges IEC -- class III single-direction transients () IEC damped MHz wave IEC -- class III ns fast transients IEC -- class IV marking on our product guarantees their conformity to European directives. Sepam 00 LD 9
41 installation and commissioning dimensions and weights Sepam 00 LD Relay mounting latch Cutout max. max. e = mm max weight:.9 kg Stabilization plate 0. 0 M - mm weight:. kg 0 Sepam 00 LD
42 surge limiter Single unit mounting isolated support M0 weight :, kg max. connection M 0 Triple unit 0 0 masse :, kg max. Ø 0. connection M0 mounting isolated support commissioning Plate before installing the plate, set the required resistance using the ohmmeter, wire the current transformers to the terminals that correspond to their current rating, in parallel with surge limiters: v between - and - for A v between - and - for A. Relay set microswitch SW, located on the back, to with or without latching (see page ), adjust the front dial to the required setting. testing Using a temporary connection ( turn), inject a current 0% above the setting ( A rating) into the toroid primary and check that the relay trips. e.g. Is = 0 % x In. I = 0. x A x. =. A. The test is carried out on each of the three plates if a three-phase relay is being used. plate Rs I CSH Sepam 00 LD
43 Ordering information Sepam 00 S0 LD (supplied with connections and mounting lugs) quantity :... rated frequency: 0 Hz... 0 Hz... version: single-phase... three-phase... auxiliary power supply: to 0 Vdc... to Vdc... 0 to 0 Vdc to Vac... 0 to 0 Vac... stabilization plate quantity resistance Ω - 0 W... 0 Ω - 0 W... 0 Ω - 0 W... 0 Ω - 0 W... 0 Ω - 0 W... surge limiters quantity single unit :... triple unit :... Schneider Electric SA postale address F-00 Grenoble cedex 9 tel : () telex : merge 0 F As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. This document has been printed on ecological paper. AC0/EN ART.99 Publishing: Schneider Electric SA Design, production: Idra Printing: 0 / 99
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SYSTEM OVERVIEW Pollution monitoring of high voltage insulators in electrical power transmission and distribution systems, switchyards and substations is essential in order to minimise the risk of power
More informationHigh precision measurement system for current and voltage IHC-A/B-RM01/03
Measurement Offset-free and low-noise 16 bit data acquisition system ISA-ASIC Internal sample rate 3,500 Hz Communication Standard RS232- or RS485 interface Advantages Direct measurement on the bus bar
More informationFor the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
Current Transducer IN 1000-S N = 1000 A For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Closed loop (compensated)
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More informationSolid-state Timer H3CR. DIN 48 x 48-mm Multifunctional Timer Series. Broad Line-up of H3CR Series H3CR-A
Solid-state Timer H3CR DIN 48 x 48-mm Multifunctional Timer Series Conforms to EN61812-1 and EN60664-1 (VDE0110) 4 kv/2. Conforms to EMC standards (EN50081-2 and EN50082-2). Approved by UL and CSA. Lloyds/NK
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