Isolation Tests - GE Multilin G650 Manual

9 COMMISSIONING

9.3ISOLATION TESTS

During all tests, the screw located on the rear of the relay must be grounded.
For verifying isolation, independent groups will be created, and voltage will be applied as follows:
2200 RMS volts will be applied progressively among all terminals in a group, short-circuited between them and the
case, during one second.
2200 RMS volts will be applied progressively between groups, during one second.
WARNING: No communication circuit shall be tested for isolation.
Groups to be created will depend on the type of modules included in G650, selectable according to the model.
The following table shows the different groups depending on the module type:
GEK-113285A
G1: H10, H18
SOURCE 1:
G2: H13, H14, H15
G1: H1, H9
SOURCE 2:
G2: H4, H5, H6
G1: A5..A12
MAGNETIC MODULE.
G2: B1..B12
G1 (Inp. 1): F1..9
G2 (Inp. 2): F10..18
I/O F1 (MIXED)
G3 (Out.): F19..36
G1 (Spv 1): F1..4
G2 (Inp. 1): F5..9
G3 (Inp. 2): F10..14
I/O F2 (SUPERVISION)
G4 (Spv 2): F15..18
G5 (Out.): F19..30
G6 (Out.): F31.36
G1 (Inp. 1): G1..9
G2 (Inp. 2): G10..18
I/O G1 (MIXED)
G3 (Out.): G19..36
G1 (Inp. 1): G1..9
G2 (Inp. 2): G10..18
I/O G4 (32DI)
G3 (Inp. 3): G19..28
G4 (Inp. 3): G29..36
G1 (Inp. 1): G1..9
I/O G4 (ANALOG)
G2 (Inp. 2): G10..18
G650 Generator Protection & Control System
9.3 ISOLATION TESTS
9-3
9