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參數(shù)資料
| 型號(hào)： | WCD-25DC-1B |
| 元件分類(lèi)： | 功率/信號(hào)繼電器 |
| 英文描述： | POWER/SIGNAL RELAY, SPST, MOMENTARY, 1A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| 文件頁(yè)數(shù)： | 1/1頁(yè) |
| 文件大小： | 52K |
| 代理商： | WCD-25DC-1B |
Function:
35
Tyco Electronics / www.tycoelectronics.com / Factory Direct Technical Support: 800-253-4560, ext. 2023 (U.S., Canada, Mexico) or 805-220-2020, ext. 2023 (International)
ANSI/IEEE C37.90-1978
Current Differential Relays are used for the protec-
tion of transformers, motors and generators, by
comparing the magnitude of the current entering
and leaving the protected circuit. On a given phase
winding, any difference between the two currents
will indicate an internal fault; the relay will sense the
vectorial difference between the two currents of the
protected section and will initiate a quick disconnec-
tion of the unit, to prevent disastrous consequences.
The relay may also be used to protect internal faults
on transformers, such as: ground faults, shorted
winding, leakage between primary and secondary,
etc. It will sense and compare primary vs. secondary
currents, once the turns ratio has been taken into
consideration.
Operation:
With control voltage applied, the output contacts
(shown in the de-energized position) will remain de-
energized as long as the difference between the two
input currents remains below the preset trip value.
The contact will transfer to the engerized position
when the current difference exceeds the trip value.
Current Differential Relay
PRODUCT SPECIFICATIONS
Sample Part No.
WCD-230AC-1-A
Type:
WCD - Close Differential
Control Voltage VAC
& VDC
120AC
208AC
230AC
380AC
416AC
460AC
525AC
575AC
Trip Adjustment Range
.5 = 0.1 amp to 0.5 amp
1 = 0.2 amp to 1.0 amp
2 = 0.4 amp to 2.0 amp
Options
A = Two normally open contacts
B = Two normally closed contacts
H = Contacts rated 3 amp at 125 VDC
P = Transient protection is provided in compliance
with ANSI/IEEE C37.90-1978
Consult factory for additional models.
PART NUMBER SELECTION
Notes:
1.
Remove black screws for access to the trip adjustments.
2.
Clockwise rotation of the adjustment potentiometer will raise the current differential trip point.
3.
The output contacts are shown de-energized.
PART NUMBER SELECTION
Part Number
Line Current .....................................
Control Voltage ................................
Differential Trip Point .......................
Operating Temperature ....................
Burden ..............................................
Output Contacts ...............................
Contact Ratings ................................
WCD Series
Single Phase, AC current, 50-400 Hz Direct or from CT
5 amp continuously
20 amp 30 seconds
200 amp, 0.10 seconds
See Part Number Selection
Screwdriver adjustable.
See Part Number Selection
-40oC to +75oC
Current input: 2.5 VA max.
Control voltage DC: 2 W max.
AC: 2 VA max.
One set, N.O., One set N..C.
5 amp resistive at 120 VAC or 28 VDC
25DC
48DC
125DC
87
.172 DIA.
4 MTG. HOLES
3
7
/8
4
5
/8
4
1/
2
4
7/
8
TERMINAL STRIPS
#6 - 32 SCREWS
WILMAR Protective Relays – WCD Series
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
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| WCD-25DC-1H | POWER/SIGNAL RELAY, SPST, MOMENTARY, 1A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| WCD-25DC-1P | POWER/SIGNAL RELAY, SPST, MOMENTARY, 1A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| WCD-25DC-2A | POWER/SIGNAL RELAY, SPST, MOMENTARY, 2A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| WCD-25DC-2B | POWER/SIGNAL RELAY, SPST, MOMENTARY, 2A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| WCD-25DC-2H | POWER/SIGNAL RELAY, SPST, MOMENTARY, 2A (COIL), 25VDC (COIL), 25000mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
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