Ground Fault Detection System
| Product Overview |
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| Arcing Ground Fault Relay Cat. No. 1409-DOBD |
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| Arcing Ground Fault Sensor Cat. No. 1409-N2 |
Bulletin 1409 — Arcing Ground Fault Detection System
- Adjustable trip from 1…6 A for maximum sensitivity without nuisance tripping
- Output Form C contact (single-pole double-throw) for application flexibility
- Time delay of 50 ms nominal to minimize nuisance tripping and allow time for high current inhibit
- Test circuit is built into test system for proper operation
The Bulletin 1409 Arcing Ground Fault Detection Systems are intended for equipment protection only. These systems are not Ground-Fault Circuit-Interrupters for personnel protection as defined in Article 100 of the U.S. National Electric Code.
Bulletin 1409 is available in two designs, Class I and Class II. The Class I systems are intended for use with shunt-trip circuit breakers or medium voltage controllers. These Class I systems do not contain a high-current inhibit circuit.
The Class II Systems are designed for use with motor starters or contactors to interrupt low-level ground faults. They incorporate a high-current inhibit circuit that guards against the controller opening when the fault current exceeds the controller interrupting capacity. Ground fault currents exceeding the interrupting rating of the controllers are designed to be cleared by the short circuit protection device (fuse or circuit breaker).
Both Class I and Class II Systems consist of two parts — a relay and a sensor. The relay contains all the detection, adjustment and output circuitry. The sensor is a special two-winding current transformer. Operation of the ground fault detection system is indicated by the relay toggle.
Standards Compliance and Certifications
Standards Compliance
CSA C22.2, No. 144
UL 1053
Certifications
CSA Certified (LR49901)
UL Listed (File E53935, Guide KDAX)
Product Selection
| Build a Catalog Number |
Your order must include the cat. no. of the arcing ground fault relays and sensor selected.
Low-level (arcing) ground faults are below the fuse or circuit breaker rating and therefore go undetected until a much larger problem develops. The Allen-Bradley Arcing Ground Fault Detection System is designed to sense these low-level faults and either drop out the motor controller or operate a shunt-trip circuit breaker to clear the fault.
Arcing Ground Fault Relays — Class II with High Current Inhibit Feature
| NEMA Starter Size | Maximum Voltage [V AC] |
Maximum Horsepower [Hp] | Full Load Current [A] | High Current Inhibit [A] | Cat. No. | |
| Min. | Max. | |||||
| 1 | 200…230 | 7.5 | 27 | 114 | 144 | 1409-BOAD |
| 460 | 10 | 14 | 63 | 79 | 1409-BOBD | |
| 575 | 10 | 11 | 50 | 62 | 1409-BOCD | |
| 2 | 200…230 | 15 | 45 | 189 | 239 | 1409-COAD |
| 460 | 25 | 34 | 153 | 193 | 1409-COBD | |
| 575 | 25 | 27 | 122 | 153 | 1409-COCD | |
| 3 | 200…230 | 30 | 90 | 360 | 456 | 1409-DOAD |
| 460 | 50 | 65 | 293 | 370 | 1409-DOBD | |
| 575 | 50 | 52 | 234 | 296 | 1409-DOCD | |
| 4 | 200…230 | 50 | 135 | 585 | 741 | 1409-EOAD |
| 460 | 100 | 124 | 558 | 706 | 1409-EOBD | |
| 575 | 100 | 99 | 446 | 564 | 1409-EOCD | |
| 5 | 200…230 | 100 | 270 | 1116 | 1413 | 1409-FOAD |
| 460 | 200 | 240 | 1080 | 1368 | 1409-FOBD | |
| 575 | 200 | 192 | 864 | 1094 | 1409-FOCD | |
| 6 | 200…230 | 200 | 540 | 2160 | 2736 | 1409-GOAD |
| 460 | 400 | 465 | 2147 | 2718 | 1409-GOBD | |
| 575 | 400 | 372 | 1719 | 2177 | 1409-GOCD | |
Arcing Ground Fault Sensors
| NEMA Starter Size | Max. Recommended Cable Size¬ | Window Diameter | Cat. No. |
| 1…2 | 2 AWG @ 600V AC | 1-9/16 in. | 1409-N1 |
| 3…4 | 250 MCM @ 600V AC 4/0 @ 5000V AC 4/0 @ 8000V ACT |
2-1/2 in. | 1409-N2 |
| 5 | 500 MCM @ 600V AC 350 MCM @ 5000V AC 350 MCM @ 8000V ACT |
3-1/4 in. | 1409-N3 |
| 6 | 2-500 MCM @ 600V AC 500 MCM @ 5000V AC 500 MCM @ 8000V ACT |
4-1/4 in. | 1409-N4 |
| ¬ For a 3-phase system with one cable per phase except as indicated. | |||
| T 8000V cable — select sensor to have a window diameter greater than 2.5 times the cable diameter. | |||
Arcing Ground Fault Relays — Class I without High Current Inhibit Feature
| Application | Max. Line Voltage [V] | Cat. No. |
| Shunt-Trip Circuit Breaker | 600 | 1409-MV |
| Medium Voltage Controller | 7200 | |
| Note:Interrupting capacity is determined by starter or circuit breaker selection. | ||
Specifications
| Response Time | 50 ms nominal plus the controller drop-out time |
| Supply Voltage | 120V AC, 60 Hz |
| Power Input | 3 VA |
| Temperature Range | The operating ambient temperature range for the sensor is –40…+85 °C (–40…+184 °F) and for the relay is 0…+65 °C (32…149 °F) |
| Output Contact Rating | Make 30 A; Break 3 A; Continuous carrying current 5 A at 120V |
Typical Wiring Diagrams
See Applicable Codes and Laws.
Class II with High Current Inhibit Circuit¬
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Class I without High Current Inhibit Circuit¬
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¬ Wiring diagrams are shown in the tripped condition.
Approximate Dimensions
Dimensions are shown in millimeters (inches). Dimensions are not intended to be used for manufacturing purposes.
Arcing Ground Fault Relay
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Arcing Ground Fault Sensors
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| Cat. No. | A | B | C | D | E | F | G | H | J | K |
| 1409-N1 | 92.6 (3-21/32) |
88.9 (3-1/2) |
104 (4-3/32) |
74 (2-15/16) |
67.3 (2-21/32) |
56.4 (2-7/32) |
92.9 (3-21/32) |
39.6 (1-9/16) |
— | — |
| 1409-N2 | 91.4 (3-19/32) |
115.8 (4-9/16) |
131.8 (5-3/16) |
77 (3-1/32) |
88.9 (3-1/2) |
88.9 (3-1/2) |
120.6 (4-3/4) |
63.5 (2-1/2) |
69.8 (2-3/4) |
54.9 (2-5/32) |
| 1409-N3 | 73.2 (2-7/8) |
144 (5-11/16) |
157.2 (6-3/16) |
54.9 (2-5/32) |
96.8 (3-13/16) |
119.4 (4-23/32) |
146.1 (5-3/4) |
82.6 (3-1/4) |
— | — |
| 1409-N4 | 77.2 (3-1/32) |
169.9 (6-11/16) |
182.6 (7-3/16) |
59.5 (2-11/32) |
123.7 (4-7/8) |
138.2 (5-7/16) |
171.5 (6-3/4) |
108 (4-1/4) |
— | — |