INSTRUCTIONS. S&C Power-Operated

Transcription

1 Type AT-2 Type or AT-3 Control ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) With Micro-AT Control TABLE OF CONTENTS NSTRUCTONS For Field Replacement Section Page Number Section Page Number NTRODUCTON... 1 NSTALLNG THE MCRO-AT SOURCE-TRANSFER REMOVNG THE TYPE AT SOJRCE-TRANSFER CONTROL....2 CONTROL... 7 m l b 1101 The equipment covered by this publication must be selected for a specific application and it must be installed, operated, and maintained by qualified persons who are thoroughly trained and who understand any hazards that may be involved. This publication is written only for such qualified persons and is not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment. This publication provides instructions for field removal of the Type AT-2 or Type AT-3 control which was originally furnished in S&C Power-Operated Metal- Enclosed Switchgear, and its replacement with Micro-AT Source-Transfer Control Catalog Number Al. These instructions apply only in instances where the metal-enclosed switchgear was furnished with one of the following Type AT Source-Transfer Controls: Type AT-2 Catalog Number or 38883, or Type AT-3 Catalog Number or These instructions ma.y also apply in instances where the metal-enclosed switchgear was furnished with a special Type AT-2 or Type AT-3 Source-Transfer Control, wherein the above-listed catalog number includes an -SXXX suffix; such applications must be reviewed and approved by S&C to verlfy their suitability for retrofitting. Each metal-enclosed switchgear application likewise must be reviewed and approved by S&C to verlfy its suitability for retrofitting. Refw to S&C nstruction Sheet for instructions on field programming and operation of the MicmAT Source-Transfer Control. Key nterlocks Metal-enclosed switchgear furnished with optional key interlocks on the entrance bays (and bus-tie bay, if applicable) is not compatible with Micro-AT the Source- Transfer Control. Such switchgear does not have wiring from the key interlocks which can relate their positions. Retrofit Kit Retrofit Kit Catalog Number CMA-1102 is required for installing the Micro-AT Source-Transfer Control in S&C Power-Operated. Tools Required 11, winch open-end wrench for #8 32 hex nuts. %inch ratchet-type socket wrench and open-end wrench for #10-32 hex-head cap screws and hex nuts. : /~s-inch ratchet-type socket wrench and open-end wrench for 1/i -20 hex-head cap screws and hex nuts. %-inch hex wrench for #10-32 socket-head machine screws. %inch flat-blade screwdriver. 1,ong-nose pliers. 0 Electric drill with %-inch bit. Voltmeter having an input impedance of at least 5,000 ohms per volt. New Publlcatlon O1993 NSTRUCTON SHEET 620m600 COMPANY ELECTRC S&C Chicago Page 1 of 12. CANADA ELECTRC S&C February Toronto 15,1993

2 AT-2 Type Type or AT-3 Control ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) With Micro-ATTM Control REMOVNG THE AT TYPE SOURCE-TRANSFER CONTROL Step 1 Step 2 Place the manual/automatic operation selector switch Decouple the Type MS-2 or Type AS-30 Switch on the Type AT control faceplate in the MANUAL Operators. Refer to the SXrC instruction sheet furnished position. See Figure 1. for the switch operators NSTRUCTON SHEET Page 2 of 12 S&C COMPANY ELECTRC February , S&C LTD. CANADA ELECTRC Chicago Toronto

3 1 REMOVNG THE TYPE AT SOURCE-TRANSFER CONTROL - Continued 1 Manual/automatic operation selector switch \ Overcurrent-lockout indicating lamp and reset pushbutton (furnished when overcurrent-lockout feature-catalog Number Suffix -K -is included) Source-voltage indicating lamps UPY~~lr, C _. *,, 1. <.,,~..,...,.,,,:.,,,,, Automatic-transfer ready ndicating lamp,.-,..l..l.e_,*, ,.._-...-,-.,,. Type AT-2 Control Type AT-3 Control Figure i. Front-panel features of S&C Type A -z ana ype A -a. source- ransrer bcmwm8. Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET () Page 3 of 12

4 ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) Type AT-2 or Type AT-3 Control With Micro-AT Control 1 REMOVNG THE TYPE AT SOURCE-TRANSFER CONTROL - Continued Step 3 Step 6 Loosen the screw fastener and draw out the Type AT control from the switchgear-bay stile, until the latch at the rear of the control locks. See Figure 2. Step 4 f the switchgear was furnished with Type AT-2 Source-Transfer Control Catalog Number or Type AT-3 Source-Transfer Control Catalog Number 38893, for use with two S&C ndoor Voltage Sensors and one voltage transfomer per source: Measure and record the difference in voltage-sensor signals between Phase 1 of the left-hand source and Phase 1 of the right-hand source, by inserting the voltmeter test probes into the appropriate test jacks on the programming panel. See Figure 3. Similarly, measure and record the difference in voltage-sensor signals between Phase 3 of the left-hand source and Phase 3 of the right-hand source. f either measurement exceeds 0.75 volts, the sequence of rotation of the two signal sources is different; refer to Drawing RD-3638 (furnished in the retrofit kit) and make the necessary voltage-sensor signal input change to the wiring harness of Relay Panel Assembly Part Number CMA-1103 (also furnished in the retrofit kit). Step 5 Remove the input plug from the input receptacle located on the programming panel at the rear of the control and immediately transfer it to the shorting receptacle. See Figure 3. Remove the left-hand entrance bay plug and the righthand entrance bay plug from their receptacles on the programming panel. See Figure 3. On Type AT-2 controls, make note of which source is the preferred and which is the alternate, so that the Micro-AT Source-Transfer Control can be set accordingly. rf the ccmtrol was furnished with optional remote-indication feature (Catalog Number Suffti -A ): Also remove the remote-indication output plug from its associated receptacle on the programming panel. See Figure 3. Step 7 Make note of the timer-adjustment dial settings on the programming panel, as well as the settings of the operating-mode selector switches on the programming panel, so that the Micro-AT Source-Transfer Control can be set accordingly. See Figure 3. Telescoping support rails voltage sensors and voltage limiters that will render This procedure short-circuits and isolates the secondaries of the voltage sensors (if furnished), isolates the voltage transformers, and also isolates the current sensors utilized with the optional overcurrent-lockout feature (Catalog Number Suffix -K ), if furnished. Figure 2. Type AT control in drawout position. A -20 x h hex-head stainless-steel cap screws and lockwashers Page 4 of 12 NSTRUCTON SHEET S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

5 REMOVNG THE TYPE AT SOURCE-TRANSFER CONTROL - Continued 1 Voltage-sensor signal adjustment screws and test jacks 1 Voltage-sensor signal adjustments and measurements nput plug (signal-voltage, control-voltage, and currentsensing input circuits) 7 \ Timer-adjustment dials on Tvoe AT-3 Controls Catalog, Numbers and Shorting receptacle nput receptacle --., Timer-adjustment dials Fuseholders for voltage-transformer secondarv fuses \ Pushbutton test switches to simulate loss of source voltage and, when the optional y overcurrent-lockout feature (Catalog Number Suffix -K ) is included, an overcurrent condition >;: Operating-mode selector switches for return transfer A Selector switch included Voltage-transformer test jacks Fuseholders for voltage-transformer grounding circuit (contain solid slugs) \ Fuseholder and test jack arrangement on Type AT-2 Control Catalog Number and Type AT-3 Control Catalog Number 38891, for use with three voltage transformers per source - W i.. j j with optional open-phase detection feature (Catalog $;,yr y;:) -L 3 j Remote-indication receptacle provided with optional remoteindication feature (Catalog Number Suffix -Al ) v Left-hand entrance bay and right-hand entrance bay plugs. e ~- 1-w n 1-.._-- - -_n-_ m--*--m e-a-,--...-la- Figure 3. Adjustment, testing, and programmmg rearures ar rear or 1 ype A -L source- ransrer boom batawy ~UU~V 38883, for use with two S&C ndoor Voltage Sensors and one voltage transformer per source. nsets show construction differences on other models. pd S&C ELECTRC Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET Page 5 of 12 February

6 ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) REMOVNG THE TYPE AT SOURCE-TRANSFER CONTROL - Continued Type AT-Z or Type AT-3 Control With Micro-AT Control Step 8 Disconnect the ground wire from the underside of the Type AT control enclosure. See Figure 4. Step 9 Remove the four V -20 X W hex-head stainless-steel cap screws and lockwashers at the top and bottom of the Type AT control enclosure, which secure the control to the telescoping support rails. See Figure 2. Then remove the Type AT control. Discard the hardware. Ground wire Figure 4. Disconnecting ground wire from underside of Type AT control. 62&6()0 NSTRUCTON SHEET Page 6 of 12 S&C ELECTRC COMPANY Chicago - S&C ELECTRC CANADA LTD. Toronto lm

7 1 NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL Step 1 Attach Top Support Part Number CM-1151 (furnished in the retrofit kit) to the upper telescoping support rail using two #lo-32 X W hex-head stainless-steel cap screws, flat washers, and self-locking hex nuts (furnished in the retrofit kit). See Figure 5. The hardware must be assembled as shoum in Detail A. Securely tighten the hardware. f the necessary holes are not present in the upper telescoping support rail, use the holes in the top support as a template and drill two x-inch holes at the positions shown. #10--32X% hex-head stainless-steel cap screw, flat washer, and selflocking hex nut (See Detail A) \ in upper telescoping support rail use holes in top support as a template and drill two X-inch holes,;.- f Upper teltarcnninn Pllnnnrt l rp-.. rail Top support Part Number CM-1151 #lo stainless-steel /flat washer #l O-32 stainless-steel self-locking hex nut DETAL A #10--32X% hex-head stainless-steel cap screw Lower telescoping gmmnnnrl clil Bottom Support Part Number CM-1153 #10--32X% hex-head stainless-steel cap screw, flat washer, and selflocking hex nut (See Detail Al f necessary holes are not present in lower telescoping support rail, use holes in bottom support as a template and drill two %-inch holes Figure 5. Attaching top and bottom supports to telescoping support raus. S&C ELECTRtC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 62&6m Page 7 of 12

8 ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) Type AT-2 or Type AT-3 Control With Micro-AT Control NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL - Continued Step 2 Attach Bottom Support Part Number CM-1153 (furnished in the retrofit kit) to the lower telescoping support rail using two #lo-32 X /2 hex-head stainlesssteel cap screws, flat washers, and self-locking hex nuts (furnished in the retrofit kit). See Figure 5. The hardware must be assembled as shown in Detail A. Securely tighten the hardware. f the necessary holes are not present in the lower telescoping support rail, use the holes in the bottom support as a template and drill two G-inch holes at the positions shown. Step 3 Remove and discard the top and bottom mounting brackets attached to the Micro-AT Source-Transfer Control enclosure. Attach Top Mounting Bracket Part Number CM-1152-l (furnished in the retrofit kit) to the top of the enclosure using four #lo-32 X 3/a socket-head stainless-steel machine screws (furnished in the retrofit kit). See Figure 6. Attach Bottom Mounting Bracket Part Number CM-l (furnished in the retrofit kit) to the bottom of the enclosure using four #lo-32 X % socket-head stainless-steel machine screws (furnished in the retrofit kit). #10-32X3/s socket-head stainless-steel machine screw 7 Top Mounting lnting Bracket Part Dart CM-1152-l Make certain that the top mounting bracket and the bottom mounting bracket are installed square with the front of the Micro-AT Source-Transfer Control enclosure. Then securely tighten the #10--32X % socket-head machine screws and apply Loctite@ threadlocker adhesive (furnished in the retrofit kit) to the screws. Bottom Mounting Bracket Part Number CM Figure 6. Attaching top and bottom mounting brackets to Micro-AT Source-Transfer Control enclosure. Step 4 Attach, to the top mounting bracket, Screw Fastener Part Number , Neoprene Washer Part Number , Spring Part Number S-84137, and Flat Washer Part Number , using Retaining Washer Part Number (furnished in the retrofit kit). See Figure 7. 62&6()0 NSTRUCTON SHEET Page 6 of 12 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

9 NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL - Continued Top Mounting Bracket Part Number CM Neoprene Washer Part Number Screw Fastener H Part Number Figure 7. Attaching screw fastener to top mounting bracket. Step 5 Loosely attach two Shock-Mount Bushings Part Number (furnished in the retrofit kit) to the top support using two /4-20 zinc-plated serrated hex nuts (also furnished in the retrofit kit). See Figure 8. Loosely attach two shock-mount bushings to the bottom support in the same manner. Set the Micro-AT Source-Transfer Control into place and loosely attach the top mounting bracket and bottom mounting bracket to the shock-mount bushings using four Yi -20 zinc-plated serrated hex nuts. See Figure 8. Step 6 Attach Relay Panel Assembly Part Number CMA-1103 to the upper and lower telescoping support rails using two l/4-20 X 5/s zinc-plated hex-head cap screws and serrated hex nuts. See Figure 8. Securely tighten the cap screws. Step 7 Place the manual/automatic operation selector switch on the Micro-AT Source-Transfer Control in the MANUAL position. Step 8 Attach the ground wire, which was formerly connected to the Type AT Source-Transfer Control enclosure, to Terminal 10 or Terminal 11 of the terminal block on the relay panel assembly. Then attach wiring harness Ground Wire G4 to the back of the Micro-AT Source- Transfer Control enclosure, using a #8 stainless-steel flat washer, #8 lockwasher, and #8-32 hex nut (furnished in the retrofit kit). See Figure 8 and Drawing RD-3612 Sheet 2 of 2 (also furnished in the retrofit kit). Step 9 nstall each retangular connector of the wiring harness in its corresponding receptacle on the back of the Micro-AT Source-Transfer Control enclosure, starting at the bottom. Attach each of the three clamp wire ties on the wiring harness to the Micro-AT control enclosure, using a #8 stainless-steel flat washer, #8 lo&washer, and #8-32 hex nut (furnished in the retrofit kit). See Figure 8 and Drawing RD-3612 Sheet 2 of 2 (also furnished in the retrofit kit). El S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 62()m6m Page 9 of 12

10 ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) Type AT-2 or Type AT-3 Control With Micro-AT Control 1 NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL - Continued 14-20X% zinc-plated hex-head cap screw and serrated hex nut h -20 zinc-plated serrated hex nut \ \ \ Shock-Mount Bushing Part Number Relay Panel -. Assembly Part Number CMA-1103 Wiring harness ground wire (not visible in photo) Ground wire 1 Clamp wire tie (not visible in photo) Micro-AT Remote indication i Left-hand 1 entrance bay and Source-Transfer receptacle right-hand entrance bay plugs Control Figure 8. nstalling Micro-AT Source-Transfer Control and relay panel assembly NSTRUCTON SHEET Page 10 of 12 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto!Bi

11 1 NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL - Continued -1 Step 10 f the switchgear was furnished with Type AT-3 Source- Transfer Control Catalog Number or 38893: The relay panel assembly has been prewired for application with Type AT-2 Source-Transfer Controls. Refer to Drawing RD-3612 Sheet 2 of 2 (furnished in the retrofit kit) and modify the wiring at the terminal block of the relay panel assembly for application with Type AT-3 Source-Transfer Controls. Step 11 Refer to Drawing RD-3612 Sheet 2 of 2 (furnished in the retrofit kit) and perform the rewiring procedure indicated at the quick-disconnect connector plug of each Type MS-2 Switch Operator or Type AS-30 Switch Operator used in conjunction with the source-transfer control. Step 15 Refer to S&C nstruction Sheet and perform the field adjustment and programming procedures for the Micro-AT Source-Transfer Control as outlined therein. Then perform the operational testing as outlined therein. Step 16 After operational testing has been completed on the Micro-AT Source-Transfer Control, again place the manual/automatic operation selector switch on the Micro-AT Source-Transfer Control in the MANUAL position. f the EVENT lamp is lit, extinguish it by following the procedure discussed in the DAGNOSTC TOOLS section of S&C nstruction Sheet Step 12 The left-hand and right-hand entrance-bay plugs each have a white plastic key inserted into one of the pins; these keys must be removed and discarded. Use a pair of long-nose pliers to remove the keys. Then connect the left-hand entrance-bay plug to its receptacle on the relay panel assembly and connect the right-hand entrance-bay plug to its receptacle on the relay panel assembly. See Figure 8. Step 13 f the Type AT Source-Transfer Control was fumzished with optional remote-indication feature (Catalog Number Suffix -Al J): Connect the remote indication plug to its receptacle on the relay panel assembly. See Figure 8. Step 14 Remove the input plug from the shorting receptacle and immediately transfer it to the input receptacle. See Figure 9. place the input plug on the input receptacle may result in damage to the voltage sensors and voltage limiters that will render the automatic-transfer scheme inoperative. Figure 9. Connecting input plug to input receptacle. s&c ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 62&6()0 Page 11 of 12

12 ndoor and Outdoor Distribution (4.16 kv through 34.5 kv) Type AT-2 or Type AT-3 Control With Micro-AT Control 1 NSTALLNG THE MCRO-AT SOURCE-TRANSFER CONTROL - Continued 1 Step 17 For all switchgear except System Modular Metal- Enclosed Switchgear: nstall Rain Shield Part Number CM-1157 (furnished in the retrofit kit) at the top of the switchgear-bay stile. See Figure 10. Step 18 Unlock the latch at the rear of the control and slowly push the control into the switchgear-bay stile. Adjust the mounting brackets as necessary, so that the control enters the stile on-center. Then securely tighten all mounting hardware. Step 19 Secure the Micro-AT control in the stile by tightening the screw fastener at the top mounting bracket. Step 20 Couple the Type MS-Z or Type AS-30 Switch Operators. Refer to the S&C instruction sheet furnished for the switch operators. Step 21 Place the manual/automatic operation selector switch on the Micro-AT Source-Transfer Control in the AUTOMATC position and confirm that the automatic-transfer ready indicating lamp is illuminated. igure 10. nstalling rain shield. 62&60() NSTRUCTON SHEET Page 12 of 12 S&C ELECTRC COMPANY Chicago. S&C ELECTRC CANADA LTD. Toronto l