ABB CIRCUIT SHIELD 49 Petunjuk Manual - Halaman 6
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Motor Overcurrent Relay
SPECIFICATIONS
INPUT CIRCUIT
Rating:
Frequency:
Burden:
Pickup Taps:
TOLERANCES
3 multiples of tap setting- continuous
200 amperes - 1 second (5 amp unit)
40 amperes - 1 second (1 amp unit)
50160 Hz.
0.02 ohms, resistive (5 amp unit)
0.10 ohms, resistive (1 amp unit)
2.5, 2.8, 3.1, 3.5, 4.0, 4.5
(5 amp unit)
0.5, .56, .62, 0.7, 0.8, 0.9
(1 amp unit)
Pickup:
+/- 10% of setting.
Operating Time (49/51): +/- 10% of setting.
TEMPERATURE RANGE
Nominal:
Additional +/ - 5% tolerance:
Must operate:
25 degrees C ambient
-15 to +55 degrees C
-30 to +70 degrees C
OUTPUT CONT ACTS
Each contact at
Tripping:
(Link Selectable For Hand Reset Or Self Reset)
Continuous:
Break:
120 vac:
at 125 vdc:
at 250 vdc:
30 amperes
5
2
30 amperes
5
0.3
30 amperes
5
0.1
Note: tolerances shown are with
respect to printed dial markings
on the relay. Final operating values may be
set by test using pickup vernier and time
dials.
For units with selector link in the hand-reset position, the contacts are reset by pressing the TARGET RESET
pushbutton. If the contacts do not reset at that time, additional time must be allowed for motor cooling.
CONTROL VOLTAGE
See relay nameplate for rating. Models available for:
120 vac
50/60 hz,
0.07 amp max.
125 vdc (100-140 range) 0.07 amp max.
llO vdc ( 88-125 range) 0.07 amp max.
220 vdc ( 175-246 range) 0.07 amp max.
24 vdc ( 19-29 range)
0.15 amp max.
250 vdc (200-280 range) 0.08 amp max.
48 vdc ( 38- 58 range)
0.08 amp max.