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Marsh Bellofram Diversified Electronics Division PBD Series 3-Phase Sequence & Voltage Band Monitor/Relays

Marsh Bellofram Diversified Electronics Division PBD Series 3-Phase Sequence & Voltage Band Monitor/Relays

Product catalog summary

Overview: The PBD Series by Diversified Electronics provides protection for three-phase sequence-sensitive equipment, ensuring operation within specified voltage limits. It monitors each phase individually for under and over-voltage conditions.

Operation: The internal relay energizes when voltages are normal and de-energizes if any phase voltage exceeds preset limits for a duration longer than the adjustable release delay. The system automatically resets when conditions normalize. It supports both Delta and Wye systems without needing a neutral connection in Wye systems.

Features: LED fault indicators assist in setup and troubleshooting, responding immediately to voltage conditions. The adjustable release delay prevents nuisance tripping from momentary fluctuations. A 4% hysteresis provides a differential between pick-up and drop-out points.

Specifications:

Output Rating: DPDT, 3 Amps @ 600 VAC, resistive; 360 VA @ 600 VAC, inductive; 1/2 hp.
Power Required: Models up to 300 VAC require 7 VA max; models over 300 VAC require 6 VA max.
Phase Sequence: ABC (will not operate CBA).
Repeat Accuracy: 0.1% at fixed condition.
Indicators: LEDs for over and under voltage faults.
Response Times: Operate in 100 mSEC; release adjustable from 0.1 to 30 SEC.
Temperature Rating: Operate from 32° to +104°F (0° to +40°C); storage from -49° to 185°F (-45° to +85°C).
Weight: 19 oz.

Model Specifications:

PBD-120-ALE: Max Voltage 155 VAC, Under 90-120, Over 120-150.
PBD-230-ALE: Max Voltage 275 VAC, Under 185-240, Over 208-265.
PBD-400-ALE: Max Voltage 485 VAC, Under 325-385, Over 415-475.
PBD-440-ALE: Max Voltage 550 VAC, Under 390-480, Over 440-540.
PBD-480-ALE: Max Voltage 570 VAC, Under 400-490, Over 460-560.
PBD-575-ALE: Max Voltage 700 VAC, Under 500-610, Over 540-690.

All voltages are phase-to-phase.

Catalog excerpts

Marsh Bellofram Diversified Electronics Division PBD Series 3-Phase Sequence & Voltage Band Monitor/Relays-1

800.727.5646 atcdiversified.com Diversified Electronics PBD Series Phase Voltage Monitors // PBD Series 219 3–Phase Sequence & Vo l t a ge B and M on i t o r / R e l a y s The PBD Series offers protection to three-phase sequence sensitive equipment that is required to operate between two voltage limits. All three phases are monitored individually for a pre-selected Under and Over voltage limit. With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (PICK-UP). When the voltages on any or all phases fall outside the preset Over/Under trip points for longer than the Adjustable Release delay, the relay will de-energize (DROP-OUT). When line conditions return to normal, the PBD Series Monitor automatically resets and the internal relay energizes. Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required. The LED fault indicators aid in set up and system troubleshooting, and glow on fault condition. The LED indicators have an immediate response to voltage conditions and operate independently of the relay. In a phase reversal condition the LED responds to voltage conditions but the relay will NOT energize. The Adjustable Release Delay is provided to ignore momentary voltage fluctuations that cause nuisance tripping. The HYSTERESIS in each unit provides a differential of 4% between the PICK-UP and DROP-OUT trip points. \\\OPERATION \\\SPECIFICATIONS OUTPUT RATING DPDT, 3 Amps @ 600 VAC, Resistive; 360 VA @ 600 VAC, Inductive; 1/2 hp POWER REQUIRED Models Up to 300 VAC 7 VA, Max. Models Over 300 VAC 6 VA, Max. RESET Automatic PHASE SEQUENCE ABC (Will Not Operate CBA) HYSTERESIS 4% REPEAT ACCURACY 0.1% @ Fixed Condition INDICATORS LED Glows On Fault; (1) For Over, (1) For Under RESPONSE TIMES Operate 100 mSEC Release 0.1 to 30 SEC, Adjustable TEMPERATURE RATING Operate 32° to +104°F (0° to +40°C) Storage -49° to 185°F (-45° to +85°C) WEIGHT 19 oz. MODEL NUMBER MAXIMUM VOLTAGE ADJUSTABLE RANGES UNDER OVER PBD-120-ALE 155 VAC 90-120 120-150 PBD-230-ALE 275 VAC 185-240 208-265 PBD-400-ALE 485 VAC 325-385 415-475 PBD-440-ALE 550 VAC 390-480 440-540 PBD-480-ALE 570 VAC 400-490 460-560 PBD-575-ALE 700 VAC 500-610 540-690 All voltages referenced on this page are phase-to-phase. \\\DIMENSIONS (INCHES) \\\WIRING

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