Relay mode, S e t – GE EPM 5200 User Manual

Page 54

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CHAPTER 9: PROGRAMMING GROUP 0 – GLOBAL METER SETUP

50

EPM 5000 series Advanced Power Meters GE Multilin

9.7: Relay Mode


NOTE
: Relays are not available for the EPM 5200P.

SWITCH DESCRIPTION

Segment

Position

A

Reversal Imbalance Control

UP!Enable

DOWN!Disable

B

AND/OR Logic

UP!AND

DOWN!OR

C & D

Relay Control

see Table 8-4

Table 9-3: SWITCH PACKS for 04P & 05P

The Switch PACKS in FUNCTIONS 4 and 5 of programming GROUP 0 control the relay position. Setting
the switches in different combinations allows the user to specify the conditions in which the relay will be
“SET” or “RESET.” The following table indicates possible configurations.

SWITCH C

SWITCH

D

DESCRIPTION

UP UP

FAIL-SAFE MODE—The normal or non-event condition is set. RESET relay
on either out of limit condition. Relay acts as a protective switch if power is
interrupted. This alerts the user if the meter or the meter power is out.

UP

DOWN

N/A (Reserved for future features).

DOWN

UP

N/A (Reserved for future features).

DOWN DOWN

RESET MODE—The normal or non-event condition is reset. SET relay on
either out of limit condition.

Table 9-4

DEFINITIONS:

RESET: There is a short between “COM” and “N.C.” (Normally closed)
SET:

There is a short between “COM” and “N.O.” (Normally open)

(See Part I: Installation and Operation.)


Example 1: Fail-safe mode normally set—non-event condition is set relay

Relay 1 will be “SET” if the instantaneous reading for frequency is between 58 Hz and 62 Hz. When all
other conditions exist, the relay will “RESET.”

NOTE: Under this setup the relay acts as a protective switch.

5 8 H z

6 2 H z

0 H z

R E S E T

R E S E T

L 1

L 2

S E T

N O P O W E R T O T H E U N I T

R E S E T


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