Specifications
41
Certifications
Safety:
UL 61010-1; CAN/CSA-C22.2 No. 61010-1-04; IEC 61010-1
Immunity:
EN 61326: 2002 (Industrial Locations)
Electrostatic Discharge:
EN 61000-4-2: 4 kV contact, 8 kV air: (B) Self-Recovering
Radiated RF Immunity:
EN 61000-4-3: 10 V/m: (A) No Degradation
Electrical Fast Transient / Burst:
EN 61000-4-4: 2 kV: (B) Self-Recovering
Surge Immunity:
EN 61000-4-5: 1 kV I/O, 4 kV AC: (B) Self-Recovering
Conducted RF Immunity:
EN 61000-4-6: 3 V: (A) No Degradation
Voltage Dips, Interrupts:
EN 61000-4-11: (B) Self-Recovering
Emissions:
FCC Part 15, Class B; EN 55022: 1994, Class B
Environmental
Operating Temperature:
-30°C to +55°C (-22°F to 131°F)
Altitude:
Up to 2000 m (6560 ft)
Operating Humidity:
non-condensing, 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 (IP 66).
Mechanical
Enclosure:
High impact, ABS and/or ABS/PC plastic
Flame Resistance Rating:
UL 94V-0, IEC FV-0
Size:
153 mm × 85 mm × 38 mm (6.02 in × 3.35 in × 1.50 in)
Weight:
310 gm (10.9 oz) 314 gm (11.1 oz)
Connectors:
Euroblock style pluggable terminal blocks
Green:
up to 12 AWG (2.5 mm
2
), 600 V
Black:
up to 12 AWG (2.5 mm
2
), 300 V
Current Transformers
WattNode meters use CTs with built-in burden resistors generating 0.33333 Vac at rated AC cur-
rent. The maximum input current rating is dependent on the CT frame size (see the tables below).
Exceeding the maximum input current rating may damage CTs, but should not harm the meter.
None of these CTs measure DC current and the accuracy can be degraded in the presence of DC
currents, as from half-wave rectified loads. The solid-core CTs are most susceptible to saturation
due to DC currents.
WattNode meters should only be used with UL recognized current transformers, which are avail-
able from Continental Control Systems. Using non-approved transformers will invalidate the meter
UL listing. The following sections list approved UL recognized current transformers.
