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Adjustable Current Switches
NSA-ADJ-CURRENT

Part Numbers

NSA-A/ACS2
NSA-A/ASCS2
NSA-A/ASCS2-L

The Adjustable Current Switches are designed for use in any AC current monitoring application in which you are looking to monitor a particular piece of equipment for equipment failure, preventative maintenance, status, and electrical load status. The current switches should be installed on the line side of the power to the electrical equipment. The current switches are available in both solid and split-core versions which also includes a Patented 35 mm Din Rail mounting foot for easy installation in panel mount applications. The solid-core versions are a great choice for new installations or OEM applications in which cost sensitivity, lower trip points and environmental issues may be of concern.

Applications

Overload Conditions, Underload Conditions, Normal Operating Conditions, Broken Belts, Belt Slippage, Locked Rotors, Equipment Failure, Fans, Pumps, Compressors, Motors, Ovens, Industrial Equipment, Lighting Status and Usage, Electrical Load Status, Local Alarms (Strobes and Audible Alarms), Preventative Maintenance Scheduling

Monitored Current Type: AC Current
Maximum Working Voltage: 600 VAC
Core Style: NSA-A/ACS2: Solid | NSA-A/ASCS2: Split | NSA-A/ASCS2-L: Split
Operating Frequency Range: 40 to 1 kHz
Sensor Power: Induced from the Monitored Conductor
Amperage Range: 0 to 250A
Isolation Voltage: 2200 VAC
Trip Point Style | Trip Point: Adjustable
NSA-A/ACS2: 0.5 to 220A | NSA-A/ASCS2: 1.5 to 220A
NSA-A/ASCS2-L: 0.6 to 180A
Hysteresis: 10% of trip point, typical
Contact Type: Normally Open (N/O)
“Status” Contact Rating: 0.2A @ 200 VAC/VDC
“Status” Contact “On” Resistance | “O” Resistance: < 10 Ohms (tripped) | > 1 Meg Ohms (Open)
Response Time: See Response Time Table
Status LED Indication: Red LED (Current above Trip Point)
Blue LED (Current Below Trip Point)
Aperture Size: 0.75” (19.05 mm)
Din Rail Size: 35 mm (U.S. Patent No. 7,416,421)
Operating Temperature Range: 5 to 104ºF (-15 to 40ºC)
Operating Humidity Range: 0 to 95%, non-condensing
Recommended Storage Temperature | RH Range: 41 to 95°F (5 to 35°C) | 40% to 85% RH, non-condensing
Enclosure Material | Flammability Rating: PC/ABS (Polycarbonate/ABS Blend) | UL94-V0
Wiring Connections: 2 Position, Screw Terminal Block (Not Polarity Sensitive)
Wire Size: 16 to 22 AWG (1.31 mm2 to 0.33 mm2) Copper Wires only
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Minimum Mounting Distance: 1” (2.6 cm minimum) between current switch (Relays, Contactors, Transformers)
Agency Approvals: UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723), CE, RoHS2, WEEE
Product Weight: NSA-A/ACS2: 0.216 lbs. (0.097 kg) | NSA-A/ASCS2: 0.270 lbs. (0.123 kg)
NSA-A/ASCS2-L: 0.280 lbs. (0.127 kg)
Product Dimensions (L x W x H): Solid Core: 2.760” (70.11 mm) x 3.343” (84.92 mm) x 1.050” (26.67 mm)
Split Core: 2.780” (70.51 mm) x 3.238” (82.25 mm) x 1.120” (28.45 mm)
Model # 0.50 Amps 0.60 Amps 0.75 Amps 1.0 Amps 1.5 Amps 10 Amps 20 Amps
NSA-A/ACS2 221 mS - 144 mS 109 mS - 63 mS 59 mS
NSA-A/ASCS2 - - - - 248 mS 68 mS 65 mS
NSA-A/ASCS2-L - 400 mS 270 mS 183 mS - 62 mS 60 mS

-: Unit was not tested (below minimum trip point or for that range).

Monitored Current Type: AC Current
Maximum Working Voltage: 600 VAC
Core Style: NSA-A/ACS2: Solid | NSA-A/ASCS2: Split | NSA-A/ASCS2-L: Split
Operating Frequency Range: 40 to 1 kHz
Sensor Power: Induced from the Monitored Conductor
Amperage Range: 0 to 250A
Isolation Voltage: 2200 VAC
Trip Point Style | Trip Point: Adjustable
NSA-A/ACS2: 0.5 to 220A | NSA-A/ASCS2: 1.5 to 220A
NSA-A/ASCS2-L: 0.6 to 180A
Hysteresis: 10% of trip point, typical
Contact Type: Normally Open (N/O)
“Status” Contact Rating: 0.2A @ 200 VAC/VDC
“Status” Contact “On” Resistance | “O” Resistance: < 10 Ohms (tripped) | > 1 Meg Ohms (Open)
Response Time: See Response Time Table
Status LED Indication: Red LED (Current above Trip Point)
Blue LED (Current Below Trip Point)
Aperture Size: 0.75” (19.05 mm)
Din Rail Size: 35 mm (U.S. Patent No. 7,416,421)
Operating Temperature Range: 5 to 104ºF (-15 to 40ºC)
Operating Humidity Range: 0 to 95%, non-condensing
Recommended Storage Temperature | RH Range: 41 to 95°F (5 to 35°C) | 40% to 85% RH, non-condensing
Enclosure Material | Flammability Rating: PC/ABS (Polycarbonate/ABS Blend) | UL94-V0
Wiring Connections: 2 Position, Screw Terminal Block (Not Polarity Sensitive)
Wire Size: 16 to 22 AWG (1.31 mm2 to 0.33 mm2) Copper Wires only
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Minimum Mounting Distance: 1” (2.6 cm minimum) between current switch (Relays, Contactors, Transformers)
Agency Approvals: UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723), CE, RoHS2, WEEE
Product Weight: NSA-A/ACS2: 0.216 lbs. (0.097 kg) | NSA-A/ASCS2: 0.270 lbs. (0.123 kg)
NSA-A/ASCS2-L: 0.280 lbs. (0.127 kg)
Product Dimensions (L x W x H): Solid Core: 2.760” (70.11 mm) x 3.343” (84.92 mm) x 1.050” (26.67 mm)
Split Core: 2.780” (70.51 mm) x 3.238” (82.25 mm) x 1.120” (28.45 mm)
Model # 0.50 Amps 0.60 Amps 0.75 Amps 1.0 Amps 1.5 Amps 10 Amps 20 Amps
NSA-A/ACS2 221 mS - 144 mS 109 mS - 63 mS 59 mS
NSA-A/ASCS2 - - - - 248 mS 68 mS 65 mS
NSA-A/ASCS2-L - 400 mS 270 mS 183 mS - 62 mS 60 mS

-: Unit was not tested (below minimum trip point or for that range).

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