GE Industrial Solutions Record Plus FG600 with SMR1 or SMR2 Trip Unit - Manual (Page 7)

7
6. Zone Selective Interlock (ZSI)
The Zone Selective Interlock (ZSI) feature is available with Short
Time and GF (Ground Fault) protection functions. This feature
helps in co-ordination of upstream and downstream circuit
breakers during fault condition.
When a downstream breaker is in ST/GF Pickup, it shall have
the capability of sending a signal to an upstream breaker
indicating the normal behavior. Without this signal from a
downstream breaker, the upstream breaker would assume that
downstream breaker hasn’t sensed the fault and will go for the
fastest delay setting (STD1/GFD1) on sensing the fault.
E – Trouble-Shooting
Ensure the breaker is installed correctly and all terminal
connections are tightened per instructions. If the breaker fails
to close check the following items:
• Ground Fault, overload and short circuit on the system.
• If the handle is in the TRIPPED position, reset the breaker
by moving the handle fully to the OFF position and then to
the ON position, as shown in Figure 5.
• The under voltage trip is supplied with its rated voltage.
• The shunt trip is de-energized and there is no trip signal.
• The breaker trip unit settings are properly adjusted. If
technical assistance is required contact your local GE
Consumer & Industrial sales office. In the US call GE Post
Sales Customer Service, 1-888-437-3765
F – Maintenance
Generally no maintenance is required but it is recommended
that the breaker be cleaned and inspected annually.
Operate the breaker Push to Test button and toggle the handle
several times, testing the mechanical operation of the device. If
there are any signs of damage or if the mechanism is sluggish
or sticky, replace the breaker. For abnormal or heavy-duty
conditions, refer to NEMA publication AB4. For recommended
maintenance practices, refer to publication NFPA70B.
WARNING:
Danger of electrical shock or injury. Turn
off power supplies ahead of equipment before attempting to
service.
G – Storage
Store in a dry, dust-free, environment protected from corrosion.
Long-term storage should be in the original shipping carton.
The storage temperature range is –40°C to +80° C.
H – Accessories
For full details of accessories and their application, contact
your local GE Consumer & Industrial representative. When
installing accessories, read the accompanying accessory
installation instruction and carefully follow all cautions and
Warnings.
Figure 5. Mechanical operation of the circuit breaker.
GE Consumer & Industrial
General Electric Company
41 Woodford Ave., Plainville, CT 06062
DEH41177 R03 © 2009 General Electric Company
These instructions do not cover all details or variations in equipment nor do they provide for every possible contingency that
may be met in connection with installation, operation, or maintenance. Should further information be desired or should
particular problems arise that are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the
GE Company.