Dwyer Instruments SCT10-100 Installation And Operating Instructions

The Series SCT Current Transformers continuously measure the current
consumption of pumps, fans, boilers, solar panels and chillers for use in energy
monitoring. Current or voltage outputs can be scaled using a slider switch to select
between three factory set ranges. Split core configuration allows the current transformer
to be installed on new and existing installations. Snap-on mounting bracket allows
for quick installation of replacement transformers. An optional 10 A command relay
can snap onto the current switch which eliminates the need to mount an additional
relay.

OPERATING INSTRUCTIONS

NOTICE The Series SCT Current Transformers are intended to provide
an input to equipment under normal operating conditions.
Additional precautions must be designed into the control system where failure or
malfunction of the current transformer could lead to personal injury or property
damage to the controlled equipment or other property. Incorporate and maintain
other devices such as supervisory, alarm systems, safety or limit controls intended
to warn of or protect against failure or malfunction of the SCT.
CAUTION Disconnect the power supply before making electrical
connections. Contact with components carrying hazardous
voltage can cause electrical shock and may result in severe personal injury or
death.

INSTALLATION

MOUNTING

1. Detach the plastic mounting bracket from the current switch housing.
2. Using the two included screws, attach the mounting bracket to the rear of the
electrical panel or enclosure.
3. Re-attach the current switch housing to the plastic mounting bracket.

WIRING

1. Disconnect the power to the conductor cable from the power source.
2. Open the core using the release tab. Snap the core closed around the power
conductor cable. Make sure that the core release tab is locked in its original
position.
3. Wire the Series SCT as shown in the below wiring diagrams.
4. Reconnect the power conductor cable.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Series SCT Current Transformer
Specifications - Installation and Operating Instructions
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MOUNTING BRACKET

SPECIFICATIONS

Amperage Range: 30/60/120 A or 20/100/150 A (depending on model).
Continuous Operating Current: 120 A or 150 A (depending on model).
Output: 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC (depending on model). Optional
relay N.O. SPST; 10 A @ 260 VAC, 5 A @ 30 VDC.
Power Requirements: Self-powered or 24 VDC (depending on model).
Accuracy: ±2% from 10 to 100% of selected range.
Temperature Limits: 5 to 140°F (-15 to 60°C).
Humidity Limits: 0 to 95% non-condensing.
Response Time: 2 seconds.
Isolation Voltage: 600 VAC RMS.
Frequency: 50/60 Hz.
Enclosure Rating: UL, V-O flammability rated, type 66 nylon.
Agency Approvals: CE, RoHS, UL.
Phone: 219/879-8000
Fax: 219/872-9057
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SNAP ON RELAY
www.dwyer-inst.com
e-mail: info@dwyer-inst.com