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NK Technologies DS3 Series Current Switches
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NK Technologies DS3 Series
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Features:
- Compact, One-piece Design
Fits in crowded motor starters, power supplies and control panels.
- Input Isolation
Much safer than shunt/relay combinations.
- Output Installation
Isolated output greatly simplifies wiring.
- Tough
Designed to handle harsh industrial environments.
- Adaptive Hysteresis
— Hysteresis is 5% of setpoint.
— Allows closer control than fixed hysteresis.
- Reliable
Solid state design.
- Built-in Mounting Bracket
Solid, secure mounting that inspectors want to see.
Applications:
- Electric Heating Elements
Instant indication of heater status.
- Power Supplies
Signals over-current before equipment fails.
- Machine Operation
Instant status of motors, lamps and other loads.
- Telecom Sites
Monitors battery output.
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| Model |
Description |
List Price |
Sale Price |
| DS3-SDT-24U |
Adjustable Setpoint, 4-100A, Top Terminals, LED, SPDT Relay, 5A@240 VAC, Output: SPDT Relay, 5A@240 VAC |
$135.00 |
| $120.15 |  |
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| DS3-NOU-24U |
Adjustable Setpoint, 4-100A, Top Terminals, LED, N.O., 0.2A @240V AC/DC, Output: N.O., 0.2A @240V AC/DC |
$130.00 |
| $115.70 | |
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| DS3-SDT-12U |
Same as Above, but uses 12VDC Nominal Power Supply, SPDT Relay, 5A@240 VAC, Output: SPDT Relay, 5A@240 VAC |
$140.00 |
| $124.60 | |
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| DS3-NOU-12U |
Same as Above, but uses 12VDC Nominal Power Supply, N.O., 0.2A @240V AC/DC, Output: N.O., 0.2A @240V AC/DC |
$130.00 |
| $115.70 | |
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DS3 Current Switches from NK Technologies combine a Hall effect sensor, signal conditioner and a limit alarm into a single package. The DS3 Series has three jumper selected current input ranges and frequency response from DC to 400Hz. Available in a top terminal solid core case with either a relay output or a universal solid state output.
Specifications:
| Output |
Isolated dry contact |
| Output Rating |
Solid State: 0.2A @ 240VAC/DC (N.O. Only)
Relay: 5.0A @ 240VAC, 5.0A @ 30VDC (SPDT) |
| Off State Leakage |
None |
| Response Time |
100mS (10% above Setpoint)
20mS (100% above Setpoint) |
| Setpoint Range |
4-20, 10-50 and 15-100A (DC)
Jumper select (derate by ÷2 for AC) |
| Hysteresis |
5% of Setpoint |
| Overload |
1,000% of range for 5 seconds
200% of range indefinitely |
| Isolation Voltage |
3kV |
| Frequency Range |
DC to 400Hz |
| Sensing Aperture |
0.75" (19mm) dia. |
| Power Supply |
20-28VDC or VAC |
| Power Consumption |
10VA |
| Case |
UL 94V-0 Flammability rated |
| Environmental |
-4 to 122°F (-20 to 50°C), 0-95% RH, non-condensing
-40 to 140°F (-40 to 60°C) (Solid State Output Only) |
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