GE M60

5-342 M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
TESTING CHAPTER 5: SETTINGS
5
5.11.2 Test mode forcing
SETTINGS  TESTING  TEST MODE FORCING
When in Forcible mode, the operand selected by the
TEST MODE FORCING setting dictates further response of the M60 to
testing conditions, as described in the following two sections.
The test mode state is indicated on the relay front panel by a combination of the Test Mode LED indicator, the In-Service
LED indicator, and by the critical fail relay, as shown in the following table.
Table 5-46: Test mode operation
5.11.3 Force contact inputs
SETTINGS  TESTING  FORCE CONTACT INPUTS
The force contact inputs feature provides a method of performing checks on the function of all contact inputs.
While in Forcible test mode, the relay contact inputs can be pre-programmed to respond in the following ways:
• If set to “Normal,” the input remains fully operational. It is controlled by the voltage across its input terminals and can
be turned on and off by external circuitry. Select this value if a given input must be operational during the test. This
includes, for example, an input initiating the test, or being a part of a user pre-programmed test sequence.
• If set to “Open,” the input is forced to report as opened (Logic 0) while the operand selected by
TEST MODE FORCING
setting is On, regardless of the voltage across the input terminals. While the selected operand is Off, the input behaves
as it does when in service.
• If set to “Closed,” the input is forced to report as closed (Logic 1) while the operand selected by
TEST MODE FORCING
setting is On regardless of the voltage across the input terminals. While the selected operand is Off, the input behaves
as it does when in service.
 TESTING


TEST MODE FORCING:
On
Range: FlexLogic operand
TEST MODE
FUNCTION
In-service
LED
Test mode
LED
Critical fail
relay
TEST MODE
FORCING
Contact input and output behavior
Disabled Unaffected Off Normal No effect Normal
Isolated Off On De-energized No effect Contact outputs disabled
Forcible Off Flashing De-energized Off Normal
On Controlled by forcing features
On restart, the TEST MODE FORCING setting and the force contact input and force contact output settings revert to
their default states.
 FORCE CONTACT
 INPUTS

FORCE Cont Ip 1
:Normal
Range: Normal, Open, Closed

FORCE Cont Ip 2
:Normal
Range: Normal, Open, Closed


FORCE Cont Ip xx
:Normal
Range: Normal, Open, Closed
On restart, the TEST MODE FORCING setting and the force contact input and force contact output settings revert to
their default states.