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Marsh Bellofram Diversified Electronics Division SPM Series Single Channel Seal Failure Alarm

Marsh Bellofram Diversified Electronics Division SPM Series Single Channel Seal Failure Alarm

Product catalog summary

Overview: The ATC Diversified SPM Series is a single-channel seal failure module designed to monitor the shaft seal of submersible pump motors. It detects leaks by sensing the position of a resistive float switch in the seal cavity. If resistance drops below a set sensitivity, the output relay is energized, and an LED indicator lights up. The relay resets automatically when the fault clears.

Specifications:

Control Voltage: 120 VAC, 50/60 Hz
Switch Voltage: 9 VDC
Isolation: 2500 Volts
Power Required: 2 VA
Duty Cycle: Continuous
Sensitivity: Fixed at 470 Ω ±10%, Adjustable from 470 Ω to 10K Ω ±10% and 4.7K Ω to 100K Ω ±10%
Contact Rating: DPDT, 10 A @ 250 VAC Resistive, 360 VA Inductive
Response Times: Operate in 15 ms, Release in 8 ms
Life Expectancy: Mechanical: 10,000,000 operations minimum; Electrical: 50,000 operations at rated load
Indicators: Red LED for leak detection
Temperature Rating: Operate from -4° to 131°F (-20° to +55°C), Storage from -40° to 185°F (-40° to +85°C)
Enclosure: 11-Pin plug-in “A” style
Weight: 8 oz.
Model Number: SPM 120 AAA

Operation: The module operates by detecting changes in resistance due to leaks, triggering the relay and LED indicator. It is designed for continuous duty and automatically resets when the fault condition is resolved.

Wiring: Specific wiring instructions are provided for proper installation and operation.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division SPM Series Single Channel Seal Failure Alarm-1

800.727.5646 atcdiversified.com Diversified Electronics SPM Series 273 Singl e Ch a nne l S e a l F a i l u r e A l a r m The ATC Diversified SPM Series Single channel seal failure module is a specialized control for monitoring the shaft seal of a submersible pump motor. A leak is detected by sensing the position of a resistive float switch installed in the seal cavity. When the resistance drops below the sensitivity rating, the output relay energizes and the LED illuminates. When the fault condition clears, the output relay resets automatically. Special Controls // SPM Series RB-11/PF013A \\\OPERATION \\\DIMENSIONS (INCHES) \\\SPECIFICATIONS CONTROL VOLTAGE 120 VAC, 50/60 Hz SWITCH VOLTAGE 9 VDC ISOLATION 2500 Volts POWER REQUIRED 2 VA DUTY CYCLE Continuous SENSITIVITY 470 ½ ±10% Fixed 470 ½ to 10K ½ ±10% Adjustable 4.7K ½ to 100K ½ ±10% Adjustable CONTACT RATING DPDT, 10 A @ 250 VAC Resistive, 360 VA Inductive RESPONSE TIMES Operate 15 ms (approximately) Release 8 ms (approximately) LIFE EXPECTANCY Mechanical 10,000,000 Operations (Minimum) Electrical 50,000 Operations @ Rated Load INDICATORS Red LED illuminates when leak is detected TEMPERATURE RATING Operate -4° to 131°F (-20° to +55°C) Storage -40° to 185°F (-40° to +85°C) ENCLOSURE 11-Pin plug-in “A” style enclosure WEIGHT 8 oz. MODEL NUMBER >>>>>> SPM 120 AAA Sensitivity 470 ½ ±10% Fixed 470 470 ½ to 10K ½ ±10% Adjustable 10K 4.7K ½ to 100K ½ ±10% Adjustable 100K \\\WIRING

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