BuyLog Flippingbook MAR 2024

METERING, BUYLOG SECTION 2

2-49

— ReliaMod™ application information Phase balancing

Changing the phase balance in the field

1-Phase residential meter-sockets should be phase balanced when connected to 3-phase source.

Standard 125-225A meter-sockets, without lever-bypass 1. Turn off power supplying this equipment Note: Phase balance strap 1 can be swiped between PH-A and PH-B. Phase balance strap 2 can be swiped between PH-B and PH-C. 2. Loosen phase-balance strap at vertical and meter-socket connection 3. Swipe strap to position required 4. Retighten strap at vertical and meter-socket connection. Torque 170 in-lbf.

As much as possible, electricians want the system balanced. Hence for a 6 meter-socket installation, they will want:

2 meter-sockets on the A-B 2 meter-sockets on the A-C 2 meter-sockets on the B-C

To phase-balance a system, electricians are often required to revise the factory setting. Hence connecting straps between meter-socket and the 3-phase lines need to be moved. Below is a summary of the factory phase connections for all ABB 3-Phase in 1-Phase out meter stacks that can be adjusted in the field and to the right are instructions for the field phase balancing of standard residential sockets, without lever-bypass.

— Position A-C

— Position A-B

— Position B-C

Factory phase connections in 3-phase in 1-phase out meter stacks

1-gang Top

2-gang Top

3-gang Top

4-gang Top

5-gang Top

6-gang

Top

A-C

A-C

A-C

A-C

A-C

A-C

Bottom

A-B

A-B

A-B

A-B

A-B

Bottom

B-C

B-C

B-C

B-C

Bottom *Balanced

A-C

A-C

A-C

Bottom

A-B

A-B

*3-gang and 6-gang meter stacks will always be evenly phase balanced from the factory.

Bottom

B-C

Bottom

*Balanced