National Meter Industries Series 1000
Single-Phase kWh Metering Transducer, Discontinued

See: E-Mon D-Mon Single Phase (2 or 3 Wire) Electric Submeters:

• Straight Read 6-Digit Counter
• CT Operated
• PC Compatible
• Phase Rate Indicators
• Software for Billing
• LEDs Indicate Operation
• Includes Two 100A  Solid Core Current Transformers
• Compliant with ANSI C12.16 accuracy, California Weights and Measures
• Also available in Three Phase.  Call for more information

Applications:

• Apartment Building Property Managers Tenant Usage
• Marinas and RV Parks etc...

The Series 1000 Single Phase Kit includes, a watt hr. transducer, mechanical counter and two 100 amp. Current transformers. The transducer needs to be installed in a UL enclosure suited for the application. The current transformers are usually installed in the circuit breaker panel with the load wires going through the solid core current transformers. The counter can be installed with the transducer or in an enclosure remotely located.

Transducer
The Series 1000 Watt Watcher Transducer has terminals for three (208/240 VAC) hot wires and a neutral. The voltage terminals are labeled 90-140 VAC #1, #2 and #3. The neutral wire is labeled NEUTRAL. The voltage wires should be protected with a 5-amp inline fuse. Any or all local and NEC Codes shall take prescience over our recommendations

Current Transformers
The current transformers are connected to terminals marked CT #1 RED and BLACK, CT #2 RED and BLACK and CT #3 RED and BLACK. The CTs are usually located with in the panel with the primary wires. The CT that is connected to CT1 needs to be the same phase wire that is connected to VAC #1. The same is repeated for CT #2 and CT #3. The CT wires can be extended up to 100' using # 16 gage wire. Twist the extended wires before pulling them into a conduit.

The standard CT that comes with the kit is rated at 100 amps. primary load. Other sizes and types are available. When installing the CTs place the white dot towards the line or source side of the circuit. You can put multiple circuits through the hole of the CT as long as the circuit wires are from the same phase. Arrange the CTs in the panel so that two inches or more from each other separates them.

Counter
The counter is usually installed in an enclosure. The enclosure can be the same as the transducer or in a remote location. The wiring between is low voltage. The miniature counter included in sealed for moisture. The counters are operated by 12 VDC and are attached to terminals labeled DISPL and COMN. There is no polarity referencing these wires.

Transducer Operation
After the watt-hr transducer, current transformers and counter are installed properly, than you can energize the transducer. The RED LED will glow when voltage is applied. The GREEN LED will blink when the counter clicks over 1 kWh. The counter can be set for 100-watt hrs. if order as such.