BECKWITH ELECTRIC Syncrocloser M-3410A Manuale - Pagina 11
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Sensing Inputs
2 Voltage Inputs: Gen/Line and Bus voltages, nominal 120 V ac, 60 Hz (Optional 50 Hz user configurable).
Will withstand 145 V ac maximum continuous voltage, 200 V ac for 1 second. Voltage transformer burden
less than 0.5 VA at 120 V ac.
3 Current Inputs: Rated current (I
2 I
continuous current and 30 I
R
5 A inputs, 0.3 A at 1 A for 1 A inputs.
Control/Status Inputs
• The status inputs, INPUT1 (breaker status 52) and INPUT2 (Auto-Sync close command), can be
used to trigger the oscillograph recorder. The control status inputs accept only dry contacts and
are internally wetted by the relay's power supply. A minimum current of 1.3 mA is required to avoid
spurious triggering of the input.
• Enable Auto-Sync close
• Enable Generator Control Unit for speed and voltage matching
• Breaker closing time: field programmable from 20 to 800 ms
Output Contacts
Auto‑Sync Close Output: Output will close for approximately 0.5 second. Normally-open dry output contact
rated to make and carry 20 A up to 250 V dc, interrupt 0.9 A, 120 V dc inductive load; 0.4 A, 250 V dc
inductive load.
Raise and Lower Voltage Jog Outputs, Raise and Lower Speed Jog Outputs: Normally-open dry output
contact rated to make and carry 20 A up to 250 V dc, interrupt 0.9 A, 120 V dc inductive load; 0.4 A, 250 V
dc inductive load.
Sync Check Close Outputs: Two programmable output relays, each with a contact are rated as per ANSI/
IEEE C37.90-1989 for tripping: make 30 A for 0.2 seconds. Available hardware configurations include two
normally open (Option B1), one normally open and one normally closed (Option B2), or two normally closed
(Option B3) contacts. The contacts will carry 8 A, break 6 A at 120 V ac, break 0.1 A at 125 V dc, inductive
break 0.1 A. Also provided is a self-test alarm output contact (form 'c') with a rating of 8 A at 120 V ac, 5 A
at 30 V dc, 125 V dc 0.15 A resistive, 0.1 A inductive.
Any of the M-3410A protective functions can be individually programmed to activate the two programmable
outputs. The user can configure the two programmable outputs to either energize or de-energize to issue
an output command.
The outputs (excluding the self-test) can have two modes of operation, LATCHING and NORMAL. The
LATCHING mode requires an operator intervention to deactivate the outputs after the condition for operation
has been removed. In the NORMAL mode, when the condition for tripping has been removed, the output(s)
will deactivate automatically after the corresponding seal-in timers have expired.
Status Output Contacts
r
V Status Output: Closed when
0.5 A at 125 V dc resistive, 1 A at 120 V ac or 250 V dc across open contact.
r
F Status Output: Closed when
rated 0.5 A at 125 V dc resistive, 1 A at 120 V ac or 250 V dc across open contact.
Auto‑Sync Close Status Output: Closed when Auto-Sync closed command is issued. Normally-open dry
output contact rated 0.5 A at 125 V dc resistive, 1 A at 120 V ac or 250 V dc across open contact.
Self‑Test Alarm Output: Form 'c' dry output contact with rating of 8 A at 120 V ac, 5 A at 30 V dc, 125 V dc
0.15 A resistive, 0.1 A inductive.
The Status Output Contacts are light duty contacts intended primarily for status interrogation by supervisory
control. They can be used to illuminate local lamps within the above maximum ratings.
) of 5.0 A or 1.0 A, 60 Hz (50 Hz user configurable). Will withstand
R
for 2 seconds. Current transformer burden is less than 0.75 VA at 5 A for
R
r
V (delta voltage) is within limits. Normally-open dry output contact rated
r
F (delta frequency) is within limits. Normally-open dry output contact
–11–
M‑5625 Digital Synchronizing System