PSI700A

Phase sequence indicator

Quickly test phase sequence or detect open phases for three-phase systems with PSI700A, a lightweight, easy-to-use solution.

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Ensure correct motor and equipment rotation

Instantly determine the phase sequence to prevent damage to motors and ensure all equipment operates in the correct direction.

Rapidly diagnose system faults

Quickly identify and pinpoint open or missing phases to minimise downtime and streamline troubleshooting.

Guaranteed reliability in any environment

Operate with confidence knowing the device requires no batteries or external power, providing dependable performance whenever you need it.

Versatile application across multiple systems

Test a wide range of three-phase systems with a voltage range of 90 to 600 volts, providing flexibility for diverse job site requirements.

Ultimate portability for professionals on the move

Lightweight, compact, and supplied with a durable canvas case, this indicator is designed for maximum convenience and protection in the field.

Full Product Details

About the product

The PSI700A Phase Sequence Indicator is precision engineering designed specifically for determining the phase sequence (rotation) of three-phase electrical systems. This compact and rugged instrument delivers reliable performance in demanding industrial and commercial environments, ensuring accurate phase rotation identification every time.

Advanced Phase Detection Capabilities

Clockwise and Counter-Clockwise Rotation Detection

This innovative device provides instant identification of phase rotation direction, clearly indicating whether your system operates with clockwise (ABC) or counter-clockwise (CBA) rotation. The dual-indication system eliminates guesswork and ensures confident system analysis.

Comprehensive Phase Voltage Monitoring

The PSI700A excels beyond basic rotation detection by monitoring all phase voltages simultaneously. Three dedicated indicator lamps confirm the presence of each phase voltage, providing complete visibility into your three-phase system's operational status.

Open Phase Detection and Identification

When phase continuity issues arise, the PSI700A immediately detects and identifies open phases. The intelligent indication system pinpoints exactly which phase has failed, enabling rapid troubleshooting and minimising system downtime.

Engineering Excellence and Durability

Self-Powered Operation

Engineered for maximum reliability, the PSI700A operates completely self-powered without requiring external power sources or batteries. This autonomous operation ensures consistent performance regardless of site conditions or power availability.

Robust Construction Without Moving Parts

The instrument's solid-state design eliminates mechanical components that could fail or require maintenance. This engineering approach delivers exceptional durability whilst reducing long-term operational costs and maintenance requirements.

Professional-Grade Build Quality

Housed within a rugged, insulated enclosure designed for hand-held operation, the PSI700A withstands the demanding conditions of industrial environments. The lightweight construction ensures comfortable extended use without compromising structural integrity.

Operational Efficiency Features

Intuitive Visual Indication System

Five strategically positioned indicator lamps provide immediate visual feedback on system status. The clear labelling system identifies ABC rotation, CBA rotation, and individual phase presence, enabling rapid system assessment.

Professional Lead Configuration

Colour-coded leads in red, yellow, and blue configurations provide 40-inch (101.6 cm) reach with insulated clips rated for CATIII 1000V applications. This professional-grade lead system ensures safe, reliable connections across diverse installation scenarios.

Wide Voltage Range Compatibility

Operating effectively across 90 to 600 volts on three-phase systems at both 50 and 60 hertz frequencies, the PSI700A accommodates virtually all industrial and commercial electrical systems encountered in professional practice.

FAQ / Frequently Asked Questions

How does the PSI700A help in testing three-phase systems?

The PSI700A instantly provides phase rotation information (ABC or CBA) and identifies open or missing phases by visually illuminating indicator lamps.

Can this device work on both high and low voltage systems?

Yes, the PSI700A is suitable for systems operating between 90 and 600 volts, ensuring versatility for various applications.

Are additional accessories required to operate the PSI700A?

No, the PSI700A is self-contained with no batteries or external power needed. It comes with alligator clips and leads included.

Is the PSI700A safe to use in industrial environments?

Absolutely. The PSI700A complies with EN 61010-1 CAT III 600V safety standards, ensuring safe operation in industrial settings.

What kind of professionals is this device best suited for?

The PSI700A is ideal for electricians, maintenance engineers, and professionals managing large electrical systems who need quick and reliable diagnostics.

Troubleshooting

Issue: Only one lamp lights up while testing.

What it means: Indicates an open phase in the three-phase system.
Solution: Check connections on A, B, and C phases to identify and repair the faulty phase.

Issue: Rotation indicator lamp does not light up.

What it means: The system phase rotation could not be determined, possibly due to incorrect connections or insufficient voltage.
Solution: Ensure proper lead connections and verify the system voltage meets the 90–600V operational range.

Issue: No lamps illuminate during testing.

What it means: Likely a complete lack of input voltage or disconnected leads.
Solution: Verify power to the system, ensure secure connections, and repeat the measurement.

Interpreting test results

Indicator Lamps for Rotation

Clockwise (ABC): One specific lamp lights up to confirm this rotation.
Counter-clockwise (CBA): Another lamp indicates this opposite sequence.

All Phases Active

Three lamps will illuminate, confirming the presence of A, B, and C phases.

Open Phase Detection

Only one relevant lamp will glow, highlighting the specific missing phase.

Fault Isolation

Observe which indicators fail to light up to identify faulty connections.

Consistent Voltage Range

If all lamps illuminate correctly under specified operating voltage, the system is functioning as expected.

FAQ / Frequently Asked Questions

Is there a warranty available for the PSI700A?

Yes, all PSI700A units come with a standard manufacturer's warranty. Please refer to your purchase documents for details.

How should I store the PSI700A?

Store the device in its provided canvas carrying case in a cool, dry location with temperatures between 0°C to 40°C to maintain performance and longevity.

Can I purchase additional or replacement accessories for the indicator?

Yes, replacement cases and alligator clips are available. Contact our service team for ordering details.