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CCS model RWNC-3Y-480-BN is a revenue grade kilowatt hour energy and power meter that communicates on an EIA RS-485 network. WattNode Revenue BACnet model RWNC-3Y-480-BN measures 1 phase with 277Vac with a neutral configuration, and 3 phase 4-wire Wye configuration with 277 to 480Vac.
BACnet Communication
- • Protocol: BACnet MS/TP (RS-485)
- • Baud Rates: 9600, 19200, 38400, and 76800 baud
- • Duplex: Half (two-wire plus common)
- • Parity (default): N81 (no parity, eight data bits, one stop bit)
- • BACnet Buffer: 512 bytes (480 byte maximum APDU length)
EIA RS-485 Interface
- • Driver Output Voltage (Open Circuit): ± 6 Vdc maximum
- • Driver Output Voltage (54Ω load): ± 1.5 Vdc minimum
- • Driver Output Current (54Ω load): ± 60 mA typical
- • Driver Output Rise Time (54Ω || 50 pF load): 900 nS typical
- • Receiver Common-Mode Voltage Range: –7 to +12 Vdc maximum
- • Receiver Sensitivity: ±200 mV
- • Receiver Bus Load: 1/8 unit load
Electrical
- • Line powered
- • Operating Voltage Range: –20% to +15% of nominal
- • Power Line Frequency: 50 or 60 Hz
- • CT Input: 0.333 Vac nominal, 0 to 0.5 Vac operating, 3 Vac maximum
Measurement Configurations
- • Single phase: two or three wire
- • Three phase: four wire wye
- • Three phase: three wire delta
- • Three phase: four wire delta
Accuracy
- • 0.5% nominal
- • Meets accuracy requirements of the ANSI C12.1 standard when used with CCS CTs rated for IEEE C57.13 class 0.6 accuracy
Regulatory
- • Listed by BACnet Testing Laboratories (BTL)
- • FCC Class B, EN 55022 Class B
- • UL and cUL Listed (UL 61010-1), file number E312220
- • CE mark
- • RoHS
Environmental
- • Operating Temperature: –30°C to +55°C (–22°F to +131°F)
- • Altitude: Up to 2000 m (6560 ft)
- • Operating Humidity: 5 to 90% relative humidity (RH) up to 40°C, decreasing linearly to 50% RH at 55°C.
- • Pollution: POLLUTION DEGREE 2 – Normally only non-conductive pollution; occasionally, a temporary conductivity caused by condensation must be expected.
- • Indoor Use: Suitable for indoor use.
- • Outdoor Use: Suitable for outdoor use when mounted inside an electrical enclosure (Hammond Mfg., Type EJ Series) that is rated NEMA 3R or 4.
Measurements
- • True RMS Power: Watts (Phase A, B, C, and sum of all phases)
- • Reactive Power: VARs (Phase A, B, C, and sum of all phases)
- • Power Factor: (Phase A, B, C, and average of all phases)
- • True RMS Energy: Kilo-Watthours kWh (Phase A, B, C, and sum of all phases)
- • Reactive Energy: kVAR-hours (Phase A, B, C)
- • AC Line Frequency
- • RMS Voltage: (Average and Phase A, B, C; line-to-line and line-to-neutral)
- • Computed RMS Current: (Phase A, B, C)
- • Demand
- • Peak Demand
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