background image

Adjustable Current Switches

 

Installation and Operation

 

 

 

#NSA-A/ACS2, NSA-A/ASCS2, NSA-A/ASCS2-L 

– 11/14/2019 

 

Specifications subject to change without notice. 

Catalog No. 11-808-743-01 

Page 

2

 of 

7

 

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) 

 

 

Response Time 

 

Model # 

0.50 Amps 

0.60 Amps 

0.75 Amps 

1.0 Amps 

1.5 Amps 

10 Amps 

20 Ampls 

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) 

 

 

Dimensional Drawing 

 

Solid Core 

 

 

 

          

 

 

 

Continued on next page 

Summary of Contents for NSA-A/ACS2

Page 1: ...ng management system or PLC 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 Part Numbers NSA A ACS2 NSA A ASCS2 NSA A ASCS2 L...

Page 2: ...t 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 Response Time Model 0 50 Amps 0 60 Amps 0 75 Amps 1 0 Amps 1 5 Amps 10 Amps 20 Ampls NSA A ACS2 221 mS 144 mS 109...

Page 3: ...ly on the Red LED to determine whether power is present at the current switch At very low monitored input currents the Red LED may not light to indicate the current is above the trip point Installation Ensure all installations are in compliance with all national and local electrical codes Only qualified individuals that are familiar with codes standards and proper safety procedures for high voltag...

Page 4: ... the tongue on the base CAUTION Mating surfaces of the magnetic core are exposed when the sensor is open Electrical contact grease present on the cores to prevent corrosion can capture grit and dirt if care is not exercised Operation can be impaired if anything prevents good contact between pole pieces Visually check the mating parts of the core before closing the current sensor Figure 2 LED The R...

Page 5: ...urrent of 0 4 Amps flowing through the NSA A ACS2 Formula Example 0 25A 0 1A 2 5 1 3 5 which rounded up equals 4 loops Wiring Instructions Carrier recommends the use of a two conductor 16 to 22 AWG shielded cable or twisted pair copper wire only for all current switch applications A maximum wire length of less than 30 meters 98 4 feet should be used between the current switch and the Building Mana...

Page 6: ...Switches Installation and Operation NSA A ACS2 NSA A ASCS2 NSA A ASCS2 L 11 14 2019 Specifications subject to change without notice Catalog No 11 808 743 01 Page 6 of 7 Digital Circuit Figure 5 Motor Fan Control Figure 6 ...

Page 7: ...r part numbers NSA A ACS2 NSA A ASCS2 and NSA A ASCS2 L Normal Loads With power on turn the 15 turn adjustment potentiometer clockwise until the Red LED turns on and stop immediately Clockwise is referenced with the terminal block location on the right The adjustable current switch is now tripped The adjustable current switch Hysteresis Dead Band is 10 of the trip point typically Clockwise Decreas...

Reviews: