Build for your application

Optional Features & Accessories

Configure the protection, timing, control, and connectivity capabilities your equipment requires—when you order or later in the field.

Configure a Phase-Guard Upgrade an Existing Unit
Phase-Guard protection relay
Protection & control

Available Phase-Guard features

Choose the capabilities that fit your control system and operating requirements.

Available new or as an upgrade
DiagnosticsFirmware 1.9+

Lost Phase Identifier

Identifies which phase was bad during a Phase Loss event, helping technicians find the source faster.

View testing instructions →
Relay control

Normal Relay Selector

Switch between normally energized and normally de-energized operation (P or PND) through software.

Core protectionIncluded

Phase Loss / Unbalance Detection

Protects against phase loss and unbalanced conditions that can prevent starting or cause excess motor heat and wear.

Core protection5–15%

Adjustable Unbalance

Allows the Phase Loss / Unbalance trip point to be adjusted from 5% to 15% phase unbalance.

Sequence protection

Reverse Phase Detection

Prevents reset when phase sequence is incorrect and displays “Reverse Phase” until proper ABC sequence is restored.

Voltage protection70% trip

Low Voltage Detection

Trips at 70% of nominal balanced voltage, resets at 90%, and includes a two-second delay to reduce nuisance trips.

Voltage protection115% trip

Overvoltage Detection

Trips when balanced voltage exceeds nominal by 15%, resets at 105%, and includes a two-second delay.

Trip timing0.5–20 sec

Phase Loss Time Delay

Delays the trip circuit after phase loss or unbalance is detected. Standard fixed delay is 1.5 seconds; adjustable settings range from 0.5 to 20 seconds.

Reset controlUp to 5 min

Reset Delay & Manual Reset

Delays reset after a corrected fault or holds the relay tripped until an operator confirms the system is ready.

Startup timingUp to 10 min

Power Up Time Delay

Prevents Phase-Guard operation for a software-selectable period following a total outage, from Normal or Trip mode.

Restart timingUp to 10 min

Normal Operation Delay

Delays operation after the relay resets to normal following a fault.

Add capabilities when you need them.

Features can be selected with a new unit or licensed later without replacing the Phase-Guard.

See how field upgrades work →
Complete your installation

Phase-Guard accessories

Add remote visibility, mounting protection, and service convenience.

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CloudCom device
Remote monitoring

CloudCom

Connect Phase-Guard to the Cloud service for text and email alerts anytime, day or night.

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Remote Display Module
Panel access

Remote Display Module

Move the display and its functions to a convenient external panel location using a 10-foot cable.

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Boltswitch capacitor unit
Stored energy

CAP2 & CAP3 Units

Capacitive trip solutions for activating 120 VAC or 125 VDC shunt trip devices.

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Phase-Guard enclosure
Mounting

Steel Enclosure

Hinged NEMA 1 steel enclosure with conduit access and mounting holes for Phase-Guard.

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USB cable and hanger bracket
Service access

USB Cable & Bracket

Keep the included service cable connected and stored safely away from the high-voltage area.

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