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How to install accessory 23G* on Group G controller?
There is an available kit for accessory 23GA/GB.
Part Number: 935150
Installation Procedure:
1. Deenergize the transfer switch. Then open the enclosure door and verify that all power is off.
2. Check the ratio on the label on the current transformers.
3. Refer to the wiring diagram and specific mounting instructions included with the CTs. Install the CTs (onto the load cables) and the shorting terminal block. Then route the wires to the bottom of the controller.
4. Locate the Group G controller that is mounted on the inside of the door. Do not remove controller cover.
5. Position the sensing module (with plug at top facing inward) onto the lower right area of the controller. Align the MPB plug and socket and push it straight inward. The four corners of the support base, and mounting screws should fit into holes in the controller. Gently tighten the two screws. Do not over tighten.
Note: If Group G separate door controls are used, plug one end of its ribbon cable into the MPB2 socket on the Current Sensing Module. Plug the other end of the ribbon cable into the MPB jack on the separate door controls.
6. Refer to the wiring diagram provided with the Series 300 transfer switch. It shows connections to the
current transformers, shorting terminal block, and to the appropriate terminals on the sensing module. After all connections are made, remove the shorting screws from the shorting terminal block.
Refer to the following links for more information:
Part Number: 935150
- Current transformers (CTs) and shorting terminal block may or may not be included. CTs are usually selected with appropriate ratio equal to or higher than the ampere rating of the transfer switch.
- This current sensing module is not needed when a Digital Power Meter or Digital Power Manager is provided.
Installation Procedure:
1. Deenergize the transfer switch. Then open the enclosure door and verify that all power is off.
2. Check the ratio on the label on the current transformers.
3. Refer to the wiring diagram and specific mounting instructions included with the CTs. Install the CTs (onto the load cables) and the shorting terminal block. Then route the wires to the bottom of the controller.
4. Locate the Group G controller that is mounted on the inside of the door. Do not remove controller cover.
5. Position the sensing module (with plug at top facing inward) onto the lower right area of the controller. Align the MPB plug and socket and push it straight inward. The four corners of the support base, and mounting screws should fit into holes in the controller. Gently tighten the two screws. Do not over tighten.
Note: If Group G separate door controls are used, plug one end of its ribbon cable into the MPB2 socket on the Current Sensing Module. Plug the other end of the ribbon cable into the MPB jack on the separate door controls.
6. Refer to the wiring diagram provided with the Series 300 transfer switch. It shows connections to the
current transformers, shorting terminal block, and to the appropriate terminals on the sensing module. After all connections are made, remove the shorting screws from the shorting terminal block.
Refer to the following links for more information:
- Group G User’s Manual: https://www.ascopower.com/us/en/download/document/ASC-TS-UM-300G-CONTROL/
- 23GA/GB Installation Manual: https://www.ascopower.com/us/en/download/document/TS-UM-300ACCES23GAGB/
Published for:ASCO Power Technologies USA
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