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M-3410A Instruction Book
2–6
2.3
External Connections
8
8
8
8
8
WARNING: The protective grounding
terminal must be connected to an earthed ground
anytime external connections have been made
to the unit.
8
8
8
8
8
WARNING: ONLY dry contacts are to be
connected to inputs (terminals TB-24, TB-25,
and TB-26) because these contact inputs are
internally wetted by the M-3410A. Application of
external voltage to these inputs may result in
damage to the unit.
8
8
8
8
8
WARNING: DO NOT open live CT circuits.
Live CT circuits should be shorted prior to
disconnecting CT wiring to the M-3410A. Death
or severe electrical shock can occur.
Figures 2-7 through 2-15 contain external connection
information that may be required for installation.
To fulfill requirements for UL and CSA listings,
terminal block connections must be made with No.
12 AWG solid or stranded copper wire inserted in
an AMP #324915 (or equivalent) connector, and
wire insulation used must be rated at 60° C minimum.
Grounding Requirements
The M-3410A is designed to be mounted in an
adequately grounded metal panel, using grounding
techniques (metal-to-metal mounting) and hardware
that assures a low impedance ground.
Unit Isolation
Sensing inputs should be equipped with test switches
and shorting devices where necessary to isolate
the unit from external potential or current sources.
A switch or circuit breaker for the M-3410A's power
shall be included in the building installation, and shall
be in close proximity to the relay and within easy
reach of the operator, and shall be plainly marked as
being the power disconnect device for the relay.
Insulation Coordination
•
Sensing Inputs: 69 V to 480 V, Installation
Category IV, Transient Voltages not to
exceed 5,000 V
•
Power Supply Mains: Installation
Category II, Transient Voltages not to
exceed 2,500 V
Torque Requirements
Terminals 1 to 28: 8.5 in-lbs (0.9605 Nm) minimum,
and 9.0 in-lbs (1.0170 Nm) maximum
Relay Outputs
All outputs are shown in the de-energized state for
standard reference. Relay standard reference is
defined as protective elements in the non-trip,
reconnection and sync logic in the non-asserted
state, or power to the relay is removed.
Replacement Fuses
F1 and F2 replacement fuses must be Wickmann
Model TR5, rated at 250 V, 3.15 A (Beckwith
Electric Part Number 420-00902).
Output Relay Status
N.C. Contact N.O. Contact
Output Relay Output Relay
actuation setting actuation setting
Deenergize Engergize
to activate to activate
Deenergize Engergize
to activate to activate
No power applied to M3410A
Power applied to M3410A
no trip signal
Trip signal issued to
output realy
Figure 2-6
Output Relay Actuation Setting
Содержание Syncrocloser M-3410A
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