Ammeter EPM-4A Operation Manual

AMMETER
EPM-4A / EPM-4C / EPM-4D / EPM-4P
EPM-4D (Ammeter with Demand) :
from the line and saving the instant and average demands. The current transformer ratio can be set between 5/5A
and 10000/5A by the buttons on the panel.
EPM-4A (Ammeter with Demand) :
as “drCt”, CT-25 current transformer which can measure between 0,07 A - 200 A must be used.
EPM-4C (Ammeter with Setpoint) :
line. If the measured AC current is over the high setpoint or it is under the low setpoint, output relay is switched
on at the end of adjusted time delay. Also, it includes all functions of EPM-4A.
EPM-4P (Ammeter with Pick-Up) :
current is over the high setpoint or it is under the low setpoint, Pick-Up relay is switched on without delay. If current
value returns within preset limits before the end of programmed delay time, Pick-Up relay is switched off without
delay.
* Important Notice:
The secondary value of current transformer must be limited at 5A.
Note : If the current on the measurement input of the device is over 6 A or measurement according to entered
primary value of current transformer is over 9999 A, there will be “hý” on the display.
Turn ( ) :
Turn number of cable, which passes inside of CT-25 is selected in this menu. This number can
be selected between 1 and 10. If only “drCt” is selected under “Ctr” menu, turn number will be activated.
MEASUREMENT RANGES
Demand Time ( ) :
Device records measured demand and maximum demand values. Demand is the
average current value measured in demand time. Maximum demand is the maximum average current value
measured in demand time. Maximum demand value remains stored, even if the power supply is off and demand
value becomes “0” (zero).
Setpoint (s p v e s p ):
When the AC current which flows through the device is over the high setpoint
value or it is under the low setpoint value, the output relay is switched on in order to generate an error signal at
the end of programmed delay time. If the AC current value returns within preset limits, before the end of the delay
time, the relay resets itself and no tripping occurs.
Latch Function ( ) :
Latch function is used to select the output relay operation mode. Either “oF”
or “on” position may be selected.
At position “oF”: If the current value returns to preset limits, output relay is switched off.
At position “on”: Even if the current value returns to preset limits, output relay remains switched on and
switches off only by pressing the “Set” button.
Instant Tripping ( ) :
If the AC current value is over the1,5 times of setting value or it is under the 0,5
times of setting value, the output relay is switched on without any delay time. This function is user-selectable.
Start Time Delay ( ):
When the current starts to flow initially, the setpoint values are ignored for the
determined time. If auto start mode is activated, after the AC current is cutted, the device returns into its initial
state.
Automatic Start Mode ( ):
If this function is disabled (off), start-up delay (Strt) is activated only when
initial current is applied to the measurement input of device. However, when this function is enabled (on), if
measured current value decreases to “0” (zero) value and increases again, start-up delay is activated.

Selection of Current Transformer Primary Value (For EPM-4A, 4C, 4D and 4P)

SET Press SET button for 3 sec.
Press UP or DOWN button until Ctr is
displayed.
SET Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
SET Press SET button to save.
Example: If a current transformer which has a ratio of 80/5 A is used,
current transformer primary value is entered as “80”.

Setting of Turn Number (For EPM-4A, 4C and 4P)

SET Press SET button for 3 sec.
Press UP or DOWN button until trn is
displayed.
SET Press SET button.
Press UP or DOWN button until requested
value is displayed.
SET Press SET button to save.

Setting of Demand Time (For EPM-4A, 4C, 4D and 4P)

SET Press SET button for 3 sec.
Press UP or DOWN button until dE t is
displayed.
SET Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
SET Press SET button to save.

Setting of High Setpoint Value (For EPM-4C and 4P)

SET Press SET button for 3 sec.
Press UP or DOWN button until SP h is
displayed.
Press SET button.
SET
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
SET Press SET button to save.
EPM-4D is designed to measure RMS value of AC current which flows
With additional features to EPM-4D, current transformer ratio is selected
EPM-4C measures the RMS value of AC current which flows from the
In addition to EPM-4C, it also has Pick-Up relay. If the measured AC
5000
0001
0010
0015
0020
2500
2750

Setting of Low Setpoint Value (For EPM-4C and 4P)

SET
SET
SET

Setting of Hysteresis Value (For EPM-4C and 4P)

SET
SET
SET

Setting of On Time Value (For EPM-4C and 4P)

SET
SET
SET

Setting of Off Time Value (For EPM-4C and 4P)

SET
SET
(“drCt” is not
available for
EPM-4D.)
(drCt is valid when SET
CT-25 is used)

Setting of Start Time Value (For EPM-4C and 4P)

SET
SET
SET

Setting of Auto Start Mode (For EPM-4C and 4P)

SET
SET
SET

Setting of Instant Tripping Function (For EPM-4C and 4P)

SET
SET
SET
1
Press SET button for 3 sec.
Press UP or DOWN button until SP L is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until hYS is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until on t is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until oF t is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until Strt is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed. (If buttons are pressed
continuously, displayed value is changed
quickly).
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until AUto is
displayed.
Press SET button.
Press UP or DOWN button until requested
value is displayed.
Press SET button to save.
Press SET button for 3 sec.
Press UP or DOWN button until trP is
displayed.
Press SET button.
Press UP or DOWN button until
requested value is displayed.
Press SET button to save. .
2500
2250
5 . 0 0 0
6 . 0 0 0