2.37
Date Code 20170814
Instruction Manual
SEL-700G Relay
Installation
Field Serviceability
Figure 2.31
Field Ground Protection With an SEL-700G Relay
Field Serviceability
The SEL-700G firmware can be upgraded in the field; refer to Appendix B:
Firmware Upgrade Instructions for firmware upgrade instructions. You detect
when a self-test failure has occurred by configuring an output contact to create
a diagnostic alarm as explained in Section 4: Protection and Logic Functions.
By using the metering functions, you determine if the analog front end (not
monitored by relay self-test) is functional. Refer to Section 10: Testing and
Troubleshooting for detailed testing and troubleshooting information.
The only two components that can be replaced in the field are the power
supply fuse and the real-time clock battery. A lithium battery powers the clock
(date and time) if the external power source is lost or removed. The battery is a
3 V lithium coin cell, Ray-O-Vac BR2335 or equivalent. At room temperature
(25°C), the battery operates nominally for 10 years at rated load. When the
relay is powered from an external source, the battery experiences a low self-
discharge rate. Thus, battery life can extend well beyond 10 years. The battery
cannot be recharged.
Fuse Replacement
To replace the power supply fuse, perform the following steps:
Step 1. De-energize the relay.
Step 2. Remove the four rear-panel screws and the relay rear panel.
Step 3. Remove the Slot
A
printed circuit board.
Step 4. Locate the fuse on the board.
Step 5. Remove the fuse from the fuse holder.
Step 6. Replace the fuse with a BUSS S505 3.15 A (ceramic),
Schurter T 3.15 A H 250V, or equivalent.
Step 7. Insert the printed circuit board into Slot
A
.
Step 8. Replace the relay rear panel and energize the relay.
SEL-2664
Field Ground
Module
SEL-700G
Generator
Relay
FIELD
(+)
FIELD
(-)
FIELD (GND)
SEL-2812MR or MT
Fiber-Optic Transceiver
Fiber-Optic
Port (ST)
Fiber-Optic cable
with ST connectors
+
-
Exciter
(Vdc)
Rotor
Iron
Field
Breakers
Brushes
Field
Winding
EIA-232
Port
(not required if Port 2 is available)
CAUTION
Equipment components are sensitive
to electrostatic discharge (ESD).
Undetectable permanent damage can
result if you do not use proper ESD
procedures. Ground yourself, your
work surface, and this equipment
before removing any cover from this
equipment. If your facility is not
equipped to work with these
components, contact SEL about
returning this device and related SEL
equipment for service.
DANGER
Disconnect or de-energize all external
connections before opening this
device. Contact with hazardous
voltages and currents inside this
device can cause electrical shock
resulting in injury or death.
Summary of Contents for SEL-700G Series
Page 14: ...This page intentionally left blank ...
Page 22: ...This page intentionally left blank ...
Page 32: ...This page intentionally left blank ...
Page 52: ...This page intentionally left blank ...
Page 106: ...This page intentionally left blank ...
Page 510: ...This page intentionally left blank ...
Page 560: ...This page intentionally left blank ...
Page 578: ...This page intentionally left blank ...
Page 588: ...This page intentionally left blank ...
Page 604: ...This page intentionally left blank ...
Page 634: ...This page intentionally left blank ...
Page 738: ...This page intentionally left blank ...
Page 802: ...This page intentionally left blank ...