Table of Contents
Advertisement
GEI-83910
INSTALLATION PROCEDURE
If after the ACCEPTANCE TESTS the relay is held in storage before shipment to
the job site, it is recommended that the visual and mechanical inspection described
under the section on ACCEPTANCE TESTS be repeated before instanation.
Before any of the following electrical adjustments are made, the relay should
be in its case, preferably mounted in its permanent location.
RELAY SETTINGS
Refer to the section on CALCULATIONS OF SETTINGS for a discussion of suggested
procedures for determining the settings of the three main units.
CARRIER-PICKUP-START UNIT (GIl
If the required setting is less than two times the mlnlmum value shown on the
namep
1
ate, the Gl aux
il
i ary current transformer shou
1
d be connected in such a way
as to step up (The green lead connected to terminal #3 and the black lead connected
to terminal #3A).
Should the required setting be greater than two times the
minimum value shown on the nameplate, interchange the green and black leads.
Using
the test connections shown in Figure
9,
apply the desired current to the relay.
Loosen the hexagonal
locking screw located at the rear of the spiral-spring
assembly.
Then slip the adjusting ring (to which the control spring is attached)
in the ring guide in a direction that will cause the normally-open contacts barely
to close at the pickup level chosen.
Retighten the locking screw and recheck the
settings.
CLUTCH ADJUSTMENT
USing the test connections shown in Figure 9, and referring to Table II, check
that the clutch slips (i.e. the induction cup begins to rotate after the normally-
open contact has closed) withi n the prescri bed
1
imits.
To prevent overheat i ng the
relay, a suggested method for determining that the clutch slips within the
prescribed limits is to apply current
5%
below the minimum shown in the table and
note that the clutch does not slip.
Next apply current
5%
above the maximum shown
in the table and note that the clutch does slip.
Unit
Gl t
G2
GO
TABLE II
CLUTCH ADJUSTMENTS
Current Rating, Amps
0.4
- 1.6
0.8
3.2
0.5
2.0
1.0
4.0
0.25
4.0
Product Pickup
Clutch Slips, Amps
3.5 - 5.0
7.0 - 10.0
7.5 - 10.0
15.0 - 20.0
10.0 - 15.0
t Values of clutch slip are primary amperes with the auxiliary
current transformer not connected for step up.
12
Advertisement
Table of Contents
