Paralleling Relays
WILMAR™ Protective Relays – 1800 Series
Function:
25
•
ANSI/IEEE C37.90-1978
•
UL file No. E58048
•
CSA file No. LR61158
#6 - 32 STUDS
6 PLACES
Application:
These relays are designed for automatic paralleling
(synchronizing) of generators. The relays sense the
phase angle displacement and the amplitude differ-
ence between two voltages and permit paralleling
only when both voltages are equal and in phase. A
short time delay is provided to assure that the
frequencies are essentially the same at the moment
of paralleling. The basic series is designed to parallel
two or more energized AC generators. The “Dead
Bus” type provides paralleling of AC generators to
the main bus. They permit electrical connection of an
energized generator to an un-energized line (Dead
Bus). If the bus is energized, connection of the
generator to the bus is permitted only when both are
synchronized.
3
Note:
Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
Part Number
Sensing Voltage .............................
Line Frequency ...............................
Pick-Up Adjustment .......................
Time Delay .....................................
Output Contacts .............................
4
2
1/
4
7 /8
4
7 /8
3
5 /8
4
11/64" DIA.
4 MTG. HOLES
PRODUCT SPECIFICATIONS
1800 Series
120 V, 230 V, 277 V, 380 V, 460 V, 575 V, & 415 V
50-500 Hz
External adjustment for field sensing of 10-30% of
nominal input voltage. (Vertical voltage differential of 6
to 18 electrical degrees).
Fixed @ 60 milliseconds is provided to assure that the
frequencies of both input lines are sufficiently close to
permit paralleling within the preset window.
One set N.O., one set N.C.
5 amp resistive at 120 VAC or 28 VDC
A. 3 Phase, 4 Wire System
Connect phase "A" of LINE 1 to terminal 1
Connect phase "A" of LINE 2 to terminal 3
Connect the neutrals to terminals 2 & 4
B. 3 Phase, 3 Wire or 1 Phase, 2 Wire System
Connect phase "A" of LINE 1 to terminal 1
Connect phase "B" of LINE 1 to terminal 2
Connect phase "A" of LINE 2 to terminal 3
Connect phase "B" of LINE 2 to terminal 4
Consult factory for additional models and options.
36
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)
Paralleling Relays
Selection Guide
(Typical Applications)
Sensing Voltage
Series 1800
Generator to Generator
Permits paralleling of two generators
only when they are "on-line" and
their voltages are equal and in phase
(synchronized)
Series 1800DB
Generator to Bus
Normally used to permit
paralleling of a generator to a
bus when: (a) both line
voltages are equal and in phase,
or: (b) when the generator is
"on-line" and the bus is "dead"
1810DBX
1820DBX
1830DBX
1840DBX
1850DBX
1860DBX
1870DBX
Series 1800DDB
Bus to Bus
Permits paralleling of two power
lines (buses) when: (a) both line
voltages are equal and in phase, or:
(b) when either bus is "hot" and the
other bus is "dead"
Function:
120 Volts
230 Volts
380 Volts
460 Volts
575 Volts
415 Volts
277 Volts
1810X
1820X
1830X
1840X
1850X
1860X
1870X
1810DDBX
1820DDBX
1830DDBX
1840DDBX
1850DDBX
1860DDBX
1870DDBX
Condition
Series 1800
Contacts
Synch.
N.C.
N.O.
Series 1800DB
Contacts
N.C.
N.O.
Series 1800DDB
Contacts
N.C.
N.O.
Energized
Line 1
1
Line 2
Line 1
2
Line 2
Line 1
3
Line 2
Line 1
4
Line 2
Line 1
5
Line 2
X
X
X
X
X
X
Not
Energized
Open
Yes
No
Close
No
Close
Open
Close
Open
Close
Open
Close
Open
Close
Open
Close
X
X
Close
X
X
Close
Open
Open
Close
Open
Close
Open
Close
Open
Close
Open
Open
Close
Open
Open
Close
Output Contact Options:
1. Two Form A. (Add -A to Model Number)
2. Two Form B. (Add -B to Model Number)
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)
37
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