T4500 AUTO SYNCHRONIZER T4800 LOAD SHARER T4900 VAR LOAD SHARER

Transcription

1 T400 AUTO SYNCHRONIZER OAD SHARER VAR OAD SHARER T400 AUTO SYNCHRONIZER OAD SHARER VAR OAD SHARER GENERATOR CONTRO REAYS

2 T400 AUTO SYNCHRONIZER arsen & Toubro is India s leading engineering, construction and manufacturing organization, a technology-driven company that infuses engineering with imagination. &T s Electrical & Automation Group offers a wide range of advanced solutions through its state-of-the-art technology and systems. Backed by world-class in-house capabilities in technology development and customer support, &T s products are geared to offer complete customer satisfaction. Introduction &T offers single function devices: auto synchronizer, load sharing device and reactive load sharing device to offer effective generator control in land and marine based applications. The T400 Auto Synchronizer provides automatic synchronization of an incoming generator to a busbar in a minimum of time. The speed is controlled via the electric servomotor on a conventional speed governor or by controlling an electronic speed controller via an intermediate motorized potentiometer. The oad Sharer provides automatic load sharing and system frequency control for parallel running generators. The load sharing is proportional, meaning that the generators will be loaded equally compared to their individual capacity. The load on each generator is compared with the load on the other generators and corrected until balance is obtained. oad sharing is necessary after synchronization in order to re-establish load balance and to obtain long term stability of load and system frequency. The VAr oad Sharer provides automatic load sharing of reactive power and voltage control for parallel running generators. The reactive load on each generator is compared with the reactive load on the other generators and corrected on the AVR (Automatic Voltage Regulator) via a motorized potentiometer until balance is obtained. Reactive load sharing is important in systems with many inductive loads, operating with relatively low power factors. In such systems the reactive kvar load is relatively large. The can be used for sharing this reactive load component between the generators. Additionally, the will provide voltage stability with increased kvar load. The can also be used for power factor (PF) control in applications where one or more generators are operated in parallel with the grid (utility). Features Automatic synchronization with relay outputs for speed control Visual indication of bus voltage, generator voltage, closing signal, delta voltage, increase and decrease signals Adjustable delta frequency and delta voltage Adjustable breaker make time Automatic voltage matching 0 hours burn-in before final test Operating temperature range: -0 C to +0 C T400 AUTO SYNCHRONIZER Vibration test up to 4g ( - 00Hz) Certified by major classification societies Flame retardant enclosure DIN rail or screw mounting Function The T400 measures the voltage across two phases on either side of the circuit breaker in order to obtain data on voltage, frequency and phase difference for closing the circuit breaker at exact phase accordance. The synchronization function will become active when the difference between the bus voltage and the generator voltage is within limits, which is indicated on the VOT ED. The voltage difference is selectable between % to 0%. If the voltage difference is too high, the voltage matching function of the unit can be used. When the synchronization function is active, the T400 will automatically adjust the speed of the generator through the governor in order to match the frequency to the busbar. Two built-in relays provide the increase and decrease pulses for a conventional governor. The length of the pulses is proportional to the frequency difference. otorized Potentiometer can be used to adapt the contact pulses to a signal, suitable for the speed trim input of an electronic speed controller. The T400 will continuously adjust the generator speed until the frequency difference is within limits. The frequency difference is adjustable on the front dial DIFF. FREQ from 0.Hz to.0hz. When the voltage and frequency difference are within limits, the closing signal will be activated just before the next phase accordance, anticipating the circuit breaker make time. VOT PROGAING Hz. DIFF. FREQ II. SEC. C/B. AKE TIE T400 AUTO-SYNCHRONIZER 9 COSE 0 DIS- ABE VOT OK CO. 9 0 FREQ. OUT. ACTIVE 4 INCR. VOTAGE ATCHING INCR. DECR. DECR. SYNC. ON C/B

3 0 T400 AUTO SYNCHRONIZER OAD SHARER The circuit breaker make time should be set on the front dial C/B AKE TIE according to the specifications of the circuit breaker. The T400 compensates for this make time so that the circuit breaker will close exactly at zero phase. The circuit breaker closing signal is a pulse signal of 0. seconds duration at terminals 9 and 0 (COSE). A connection between terminals and (DISABE) will disable the closing signal, but will not influence the automatic frequency alignment. When commissioning, it is recommended to disable the closing signal with this connection. Check that the closing signal indicated on the REAY ED is at phase accordance. Specification ax. voltage Type Selection Table 0V Voltage range 0-0% Consumption 4VA at UN Frequency range - 0Hz Frequency difference Hz C/B make time 0-00ms Voltage difference - 0% Contact rating AC: 400V, A, 0VA DC: 0V, A, 00W Operating temperature -0 to +0 C Vibration test 4g (00-00 Hz) EC CE according to EN008-, EN008-, EN008-, EN008- Approvals Certified by major classification societies Burn-in 0 hours before final test Enclosure material Polycarbonate, flame retardant Weight 0.kg Dimensions 0 x 0 x mm (H x W x D) Installation DIN rail or two 4mm (/ ) screws Type Terminals -, - Terminals -, - T V 400V T V T V 4V T V V T V 0V T V 00V T V Other supply voltages and combinations are available on request. Features Automatic load sharing with relay outputs for speed control Visual indication of voltage, increase, decrease and unload signals -wire communication with other oad Sharers System frequency control Unload facility Reverse power and unloaded trip 0 hours burn-in before final test Operating temperature range:-0 C to +0 C Vibration test up to 4g RS Certified by major marine classificationsocieties Flame retardant enclosure DIN rail or screw mounting Function The input to the is the voltage and current, from which the active load and frequency are determined. The calculates I x cos f, representing the active load. The load on each generator is compared with the load on the other generators. Contact signals for increase and decrease with proportional pulses are obtained as output. These pulses regulate the frequency and load via the electric servomotor on a conventional speed governor, or by controlling an electronic speed controller via an intermediate otorized Potentiometer. The speed governor must operate with droop (frequency decrease with load increase) in order to obtain fast load balance with load changes. An unload function is also provided. When activated, the will reduce the generator load to zero. A built-in relay. Application Diagram. can automatically trip the circuit breaker when the unload procedure is completed. The has a built-in reverse power protection with selectable limits and time delays. Supply voltage / current: The supply voltage from and is connected to terminals and or and, depending on the system voltage. The measuring current from is connected to terminals and with referring to the generator. The current measurement must be taken from the same phase on all generators. The current is measured in the phase that is not supplying the unit. It is important to ensure that the phase sequence is correct. This relation between the connections of voltage and current must be correct in order to achieve a correct load measurement. It can be checked on terminal (TEST OUT), where an input of nominal current (A or A) and power factor.0 gives -.0V for correct connection. Common reference: Terminal (CO.) is common reference for all terminals to and 8 to 9. OAD SHARER Dimension 0 Power and frequency balance: Two normally de-energized relays (INCR. and DECR.) with ED indications on terminals 4, and, are for increase and decrease pulses to the governor servo motor or to an intermediate otorized Potentiometer (controlling the speed trim input of an electronic speed controller). The width of the pulses is proportional to the frequency / load difference. 0 0 Fixing holes x ø 4. mm. Dimensions in mm. Communication between load sharers: For communication between the load sharers all terminals (CO.) are inter - connected, as well as all terminals (+). Unload: Connecting terminals (UNOAD) and will reduce the power on the generator to zero load, and maintain zero load. When the load passes below % load, a trip signal is provided as a normally open (NO) contact on terminals -4 and a normally closed (NC) contact on terminals 4-. This trip signal can be used to trip the circuit breaker.. Frequency out: Connecting terminal 8 (FREQ. OUT) to terminal will disable the frequency control and can be used when running in parallel with the grid where the frequency is fixed by the grid. 4

4 OAD SHARER OAD SHARER Frequency in / sync. control: An external voltage injected between terminals 9 (FREQ. IN) and can control the frequency. The same signal can be connected between terminals 9 (FREQ. IN) and. The synchronizing control on terminal 8 (SYNC.) will switch this signal on and at the same time disable the internal frequency control. This feature can be used for simultaneous synchronization of already parallel running generators to another busbar section, a shaft generator or the grid. An output from terminals (CO) and (FREQ. OUT) on the T400 connected to terminals (CO) and 9 (FREQ. IN) on all the oad Sharers will allow the frequency to be aligned for synchronizing. Terminals 8 (SYNC.) on all load sharers are interconnected and with a contact between terminals 8 and, the external frequency signal from T400 Synchronizer on terminal 9 will be active and all internal frequency controls are disabled Watt in: Between terminals 0 (WATT IN) and a negative voltage.0v from a volt free watt converter can be connected to substitute the internal load measuring circuit. In this case no current transformer (CT) needs to be connected to terminals and. ost standard measurement signals can be adapted with external resistors. 0-0V : Series resistor 80kW 0 - ma : Parallel resistor 00W Reverse power trip / unload trip: The reverse power trip operates at 0% with a delay of 0 sec., but it can be reduced to % by bridging terminals and 8 and to sec. delay by bridging terminals 8 and 9. A resistor of 0kW between terminals and 8 gives.%, a resistor of.w between terminals 8 and 9 gives. sec. delay. If the generator is unloading (contact between terminals and ) a trip signal is obtained when the load passes below +% load. Both tripping signals are available on the same potential free contact set, normally open (NO) contact on terminals -4 and normally closed (NC) contact on terminals 4-. The reverse power trip signal is continuous, and the unload trip signal has a duration of 0. sec. Auto mode: Terminals and (AUTO) must be bridged for automatic load sharing function.if only reverse power protection is wanted, the terminals should be disconnected. Adjustments: OAD DEV. can be used for fine adjustments of the load balance. It should also be used to obtain balance with generators of different size and with different types of CTs. For generators of the same size and with the same type of CT the setting 0 should be used on all load sharers. SYS. FREQ.: is used for adjustment of the system frequency. It can be adjusted between 48Hz and Hz. STABIITY: is used for adjusting the regulation time. A high setting of STABIITY will give a slow, but accurate regulation. A low setting will give a fast regulation. However, too low a setting may cause instability. With the STABIITY adjustment the proportional band (pulsing band) is adjustable between ±0-0% load and ± - % frequency, and the dead band zone (in balance - no pulsing) is adjustable between ± -0% load and ±0. -.0% frequency. Trouble Shooting: If load balance is not obtainable If load balance is not obtainable and the load goes to maximum or reverse power, one of the signals is inverted due to wrong polarity or interchanged wires. If this is the case, the following should be checked:. The polarity of the power measuring signals on terminal (TEST OUT) must be positive with the generator on load. If the polarity is positive, change the voltage connections and or and or the current connections and.. Increase and decrease outputs should be obtained as indicated by the EDs on the front.. The parallel lines connected to (CO.) and (+) between load sharers must not be interchanged. Incorrect oad Balance: If there is a balance point, but the load balance is incorrect, the following should be checked:. oad deviation shall be set to 0 for same size of generators and same type of CTs.. If the deviation from other generators is approximately two times, it is likely that the current on terminals and is measured in one of the phases supplying the. The current must be measured in thephase that is not supplying the unit. Check the voltage on terminal (TEST OUT) to be -.0V DC for nominal current input (IN=A or IN=A) and power factor =.0. A current measurement in a wrong phase will give +V DC. Example: If the current in terminals and is.0a, the nominal current IN is A, and the power factor is 0.8, then the voltage for correct connection is: - x ( / ) x 0.8 = -0.4V. Fluctuating oad If there is a correct balance point, but the load is fluctuating up and down, the STABIITY should be turned clockwise in order to obtain stability, but not more than necessary. Specification OAD SHARER ax. voltage 0V Voltage range 0-0% Consumption Voltage 4VA at U N Current 0.4VA at IN Continuous current x I N Frequency range - 0Hz Frequency adjustment 48 - Hz Proportional band ±0-0% load ± - % frequency Dead band zone ± - 0% load ±0. -.0% frequency Contact rating AC: 400V, A, 0VA DC: 0V, A, 00W Operating temperature -0 C to +0 C Vibration test 4g RS according to IEC EC CE according to EN008-, EN008-, EN008-,EN008-, EN000--:999 Burn-in 0 hours before final test Enclosure material Polycarbonate, flame retardant Weight 0.kg Dimensions 0 x 0 x mm (H x W x D) Installation DIN rail or two 4mm (/ ) screws Type Selection Table Type Terminals -, - Terminals -, - IN V 400V A.000 0V A V 0V 4V 00V A A V 400V A.000 V 0V A.000 0V 00V A Other supply voltages, nominal currents and combinations are available on request.

5 VAR OAD SHARER VAR OAD SHARER Features Automatic load sharing of reactive power Voltage control facility -wire communication with other Power factor control when running in parallel to the grid Unload and trip facility Visual indication of voltage, increase, decrease and unload signals 0 hours burn-in before final test Operating temperature range: -0 C to +0 C. Flame retardant enclosure DIN rail or screw mounting Function The input to the is the voltage and the current from which the reactive power and voltage is determined. The calculates I x sin f, representing the reactive kvar load. The reactive load on each generator is compared with the reactive load on the other generators. Contact signals for increase and decrease with proportional pulses are obtained as output. These pulses regulate the voltage and reactive load by controlling the AVR via an intermediate otorized Potentiometer. An unload function is also provided. When activated, the will reduce the generator reactive power to zero or the power factor to.0. Power factor control for parallel operation with the grid can be obtained by connecting an external contact between terminals (CO) and 8 (PF ON). The setting is determined by an external potentiometer (00kW) across terminals 9 and 0 (PF-SET). Supply voltage / current: The supply voltage from and is connected to terminals and or and, depending on the system voltage.the measuring current from is connected to terminals and with referring to the generator. The current measurement must be taken from the same phase on all generators. The current is measured in the phase that is not supplying the unit. It is important to ensure that the phase sequence is correct. This relation between the connections of voltage and current must be correct in order to achieve a correct load measurement. It can be checked on terminal (TEST OUT), where an input of nominal current (A or A) and power factor.0 gives -V for correct connection. Common reference: Terminal (CO.) is the common reference for terminals to. VAR OAD SHARER Reactive power and voltage balance: Two normally de-energized relays (INCR. and DECR.) with ED indications, on terminals 4, and, are for increase and decrease pulses to the motorized potentiometer. Via the motorized potentiometer, the setting of the automatic voltage regulator (AVR) is done in order to regulate the reactive power with optimum speed and stability. The width of the pulses is proportional to the voltage / KVar load difference. Communication between load sharers: For communication between the reactive load sharers all terminals (CO.) are interconnected, as well as all terminals (+). Unload: Connecting terminal (UNOAD) and terminal will reduce the reactive power on the generator to zero and maintain zero reactive power. If the unit is in power factor control, the power factor will be adjusted to.0. Power factor control: A contact between terminal 8 (PF ON) and terminal will change the function from Var load sharer to power factor controller. A variable resistor between terminal 9 and terminal 0 of 00kW determines the power factor from.0 to 0. inductive. Zero W gives a power factor of.0, increasing resistance will give decreasing power factor. A contact between terminals (UNOAD) and will regulate the power factor to.0, independent of the selected power factor on terminals 9-0. Trip enable: If the generator is unloading (contact between terminals and ) a trip signal is obtained when the reactive load passes below +%. In power factor control mode the trip signal is obtained when the power factor approaches.0. The tripping signals are available on the potential free contact set, normally open (NO) contact on terminals -4 and normally closed (NC) contact on terminals 4-. Adjustments: VAr-OAD DEV. can be used for fine adjustments of the kvar load balance. It should also be used to obtain balance with generators of different sizes and with different types of current transducers (CTs). For generators of same size and with same type of CT, the setting 0 should be used on all load sharers. VOT. DEV. can be used for adjustment of the generator voltage. An adjustment of approximately ±% from nominal voltage is possible. STABIITY is used for adjusting the regulation time. A high setting of STABIITY will give a slow but accurate regulation. A low setting will give a fast regulation. However, too low a setting may cause instability. With the STABIITY adjustment the proportional band (pulsing band) is adjustable between and % and the dead band zone (in balance no pulsing) is adjustable between and 0%. Trouble shooting If the kvar load balance is not obtainable: If the kvar load balance is not obtainable and the reactive load is only increasing or decreasing continuously, one of the input signals is inverted due to wrong polarity or interchanged wires. If this is the case, the following should be checked:. The polarity of the kvar power measuring signal on terminal (TEST OUT) must be negative for inductive load. If the polarity is positive, change the voltage connections and or and or the current connections and.. Increase and decrease outputs should be obtained as indicated by the EDs on the front.. The parallel lines connected to terminals (CO.) and (+) between load sharers must not be interchanged Incorrect kvar oad Balance should be checked:. oad deviation should be on zero for identical generators and installations. Small differences can be corrected here.. If the deviation from other generators is approximately two times, it is likely that the current on terminals and is measured in one of the phases supplying the T4400. The current must be measured in the phase that is not supplying the unit. : If there is a balance point, but the kvar load balance is incorrect, the following VAr OAD SHARER 0 4 Voltage out: Connecting terminal 8 (VOT OUT) to will disable voltage control and is used when running in parallel with the grid, where the voltage is fixed by the grid. VAr in: Between terminals 0 (VAr IN) and a negative voltage.0v from a volt free VAr converter can be connected to substitute the internal reactive power measuring circuit. In this case no current transducer needs to be connected to terminals and. ost standard measurement signals can be adapted with external resistors 0-0V : Series resistor 80kW 0 - ma : Parallel resistor 00W Fluctuating kvar load : If there is a correct balance point, but the kvar load is fluctuating up and down, the STABIITY should be turned clockwise to obtain stability, but not more than necessary. AVR APPICATION DIAGRA 8

6 0 VAR OAD SHARER APPICATIONS Specification ax. voltage 0V Voltage range 0-0% Consumption Voltage 4VA at U N Current 0.4VA at IN Continuous current x I N Frequency range - 0Hz Frequency adjustment 48 - Hz Proportional band ±0-0% load ± - % frequency Dead band zone ± - 0% load ±0. -.0% frequency Contact rating AC: 400V, A, 0VA DC: 0V, A, 00W Operating temperature -0 C to +0 C Vibration test 4g RS according to IEC EC CE according to EN008-, EN008-, EN008-,EN008-, EN000--:999 Burn-in 0 hours before final test Enclosure material Polycarbonate, flame retardant Weight 0.kg Dimensions 0 x 0 x mm (H x W x D) Installation DIN rail or two 4mm (/ ) screws Type Selection Table Type Terminals -, - Terminals -, - IN V 400V A.000 0V A V 0V 4V 00V A A V 400V A.000 V 0V A.000 0V 00V A Other supply voltages, nominal currents and combinations are available on request. Dimension ( & ) 0 Synchronization and load sharing with T400 and using conventional governors Synchronization and load sharing with T400, using electronic governors 0 0 Fixing holes x ø 4. mm. Dimensions in mm.. Type Approvals and Certificates (T400, ) The has been designed and tested for use in harsh environments. The unit is based on standard components, providing long term durability. The carries the CE label and has been approved by the following marine classification societies: American Bureau of Shipping Bureau Veritas Croatian Register of Shipping Germanischer loyd Korean Register of Shipping Romanian Register of Shipping Russian aritime Register of Shipping EEC. GOV. WITH 4 EEC. GOV. WITH 4 E

7 VAR OAD SHARER Synchronizing two generators on load sharing to the grid with T400 APPICATIONS Active- and reactive load sharing. FRO TO NEXT FRO TO NEXT SYNCHRONIZER T400 VAr OAD SHARER OAD SHARER VAr - UNOAD INCREASE 4 DECREASE BAR 4 IN- CREASE DE- CREASE UNOAD OTOR SUPPY OTOR SUPPY 4 OTORPOT. AVR OAD SHARER OAD SHARER Single generator with constant grid load and power factor regulation POWER FACTOR REGUATOR OAD REGUATOR IPORT POWER SET INDUCTIVE PF SET 8 9 VAr OAD SHARER 0 OAD SHARER POWER REFERENCE B900-xx-0 VAr - UNOAD INCREASE 4 DECREASE INCREASE 4 DECREASE UNOAD OTOR SUPPY OTOR SUPPY CONSUER AVR OTORPOT.