Cooper Power Systems Kyle Type ME Series, Maintenance Instructions Manual, Page: 31 / 50

S280-75-2
31
Figure 47.
Battery test terminals.
Figure 48.
Comparison of charging rates.
BATTERY CHARGING
To check the battery charging operation:
1. Make sure control is in home (reset) position by moving
manual operator to “CLOSE.”
2. Connect a dc milliammeter into right hand pair of battery-test
terminals(
←
l
→
),see Figure 47. Loosen both terminals
slightly and disconnect shorting link from between terminals.
3. With battery charger deenergized, current will flow opposite
to the direction shown by CHG. Under normal conditions,
quiescent drain will be 1-1/2-to 2-mA. However, shorter time
reset plugs and certain accessories can, as shown in Table
11, increase quiescent drain above nominal value.
NOTE: To verify the charge/discharge polarity of the test meter,
momentarily actuate the LAMP/LOCKOUT TEST toggle switch to
"LAMP TEST." The current measured is a discharge current.
TABLE 11
Quiescent-Battery Drain Above Normal*
Description Drain (mA)
3-second reset plug 2.3
10-second reset plug 0.8
Sequence coordination accessory (if blocked in
home) 0.8
Remote minimum-trip double-supervisory contacts
closed) 6
Targets 1.9
* For complete list of accessory quiescent drain, see the Service Information
manual on the MET Tester, S28O-76-1.
4. With the battery charger energized, current will flow in the
direction shown by CHG. The charging rate should be
approximately 17-mA minus the discharge rate measured in
Step 3, if the control is equipped with the fixed rate battery
charging board ( MEA 388-1). The charging rate wilI vary
with internal control cabinet temperature if equipped with the
temperature regulated charging board (MEA 1172), See Figure
48). A typical charging rate will be about 27 mA, at normal room
temperature.
NOTE: The 17-mA charging rate is a nominal value based on a 27-volt
battery and rated input parameters (e.g. 120-Vac). Even under these
standard conditions. a variation of +2-mA may be observed in the
charging rate.
Prior to 1978 many recloser-control combinations (control
serial numbers below 26000) had the battery-charging circuitry
in the recloser. Refer to ME control installation manual S280-
75-1 for exact Control-Recloser interchangeability.
•
In the RE & WE family (Form 3 ME Control era), where the
charging supply is taken from the line on B phase, at least
40-amps must flow in B phase for a minimum of 12 hours per
24-hour day to maintain an adequate battery charge.
•
In the motor operated equipment (VS, ME and CE family)
manufactured between 1969 and 1978 the charging supply is
taken from the 240-Vac motor supply that is required to oper-
ate the recloser. To maintain battery charge on these units,
the 240-Vac supply must be connected to the recloser, and
the recloser and control must be connected via the control
cable. After 1978 (above serial number 26000) most controls
were provided with battery-charging circuitry within the con-
trol itself. These require 120-Vac (or 240-Vac) to be connect-
ed to the control’s power-supply-input terminals.
Failure to get the proper charging rate can be caused by
either a high control quiescent-battery discharge rate or by a
malfunction in the battery-charger circuitry. To help isolate prob-
lems in the battery-charging circuitry, see Figures 49, 50 and 51
and Table 12.
NOTE: A totally discharged battery may indicate an excessive quies-
cent-battery discharge rate due to a problem in the ME control. Test
quiescent-battery discharge rate with a fully charged battery.