MODEL 108B

Product catalog summary

Overview
The Models 108B (50/60Hz) and 125C (400Hz) Phase Sequence Detectors are designed to determine the correct phase sequence (ABC or CBA) in electrical installations. This is crucial for the proper functioning of motors, wattmeters, transformers, and other electrical equipment.

Specifications

Model 108B: Operates at 50/60Hz
Model 125C: Operates at 400Hz
Voltage Range: 208 - 480VAC
Leads: 18-inch color-coded with alligator clips
Weight: Maximum 8 oz.
Enclosure Material: ABS plastic

Operation
To use the detector, connect it to a 3-phase circuit (208 to 480 volts, Wye or Delta). The ABC lamp will illuminate if the phase sequence is correct and all phases are present. If one phase is open, both lamps will light up. If two or more phases are open, neither lamp will illuminate.

Connection Instructions

Connect the three clip leads to the 3-phase power source.
Apply AC power. One lamp should illuminate to indicate the phase sequence.
If the desired sequence is not lit, swap any two leads.
If both lamps illuminate, check for a voltage loss on one phase. If neither lamp illuminates, check for a voltage loss.

3-Phase Power Basics
In a 3-phase system, the lines are typically designated as A-B-C. The phase sequence is crucial as it affects the direction of rotation in motors and the performance of phase-sensitive equipment.

Warranty
The product comes with a 5-year Unconditional Warranty covering defects in materials and workmanship. For warranty details, refer to the Terms and Conditions of Sales in the Time Mark catalog or contact Time Mark.

Safety Instructions
Potentially hazardous voltages are present at the terminals. Ensure all electrical power is removed when connecting or disconnecting wiring. Installation and servicing should be performed by qualified personnel.

Catalog excerpts

• Indicates Phase Sequence • Detects Loss of One or More Phases • Compact & Lightweight • Color-coded Leads SPECIFICATIONS DESCRIPTION The Models 108B (50/60Hz) and Model 125C (400Hz) Phase Sequence Detectors permit the operator to quickly and easily determine proper phase sequence (either ABC or CBA). This can be vitally important information when installing, or making wiring changes to motors, wattmeters, transformers, electrical installations, power factor meters or generators. To use, connect the Detector to any 3-phase circuit from 208 to 480 volts, Wye or Delta. Proper phase sequence, and all phases present will illuminate the ABC lamp. An open phase condition will illuminate both lamps. If two or more phases are open, neither lamp will illuminate. See the Condition Chart. E-mail: [email protected] Internet: http://www.time-mark.com 1 1440 East Pine Street Tulsa, Oklahoma 7411 6 11/2011 © 2011 TIME MARK CORPORATION TIME MARK is a division of

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Phase Sequence DetectorsREAD ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE. KEEP THIS DATA SHEET FOR FUTURE REFERENCE. GENERAL SAFETY POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 108B OR 125C DETECTORS. ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING. THIS DEVICE AND WIRING SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL. CONNECTION Connect the three clip leads to the 3-phase power source. Apply AC power. One of the detector lamps should illuminate, indicating the phase sequence as connected. If the desired...

Open the catalog to page 2

MODEL 108B

MODEL 108B

Catalog excerpts

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