# How do you use rotation meter?

How to use a phase rotation meter

## How do you use rotation meter?

How to use a phase rotation meter

1. Locate and turn off main breaker supply.
2. Connect the phase rotation meter alligator clips to the exposed copper or metal of the leads to be tested.
3. Turn main breaker supply on.
4. Observe the meter for rotation.
5. Turn main breaker supply off and remove alligator clips from the circuit.

### What is the purpose of a phase rotation meter?

The phase rotation meter is ideal for determining the phase rotation in all areas where three-phase power supplies are used to feed motors, drives and electrical systems. The phase rotation meter has a voltage range of up to 690 VAC.

#### What does phase rotation mean?

REVIEW: Phase rotation, or phase sequence, is the order in which the voltage waveforms of a polyphase AC source reach their respective peaks. For a three-phase system, there are only two possible phase sequences: 1-2-3 and 3-2-1, corresponding to the two possible directions of alternator rotation.

How many leads does a phase rotation meter contain?

Your meter has six leads on it, three on the load (or motor) side and three on the supply (or line) side. There are two steps. First determine which leads on the motor are A, B, and C phase; then determine which leads on the supply correspond.

Can you check phase rotation with a multimeter?

Unfortunately, It isn’t possible to check phase rotation with a standard multimeter. Phase rotation must be checked with a specialized tester like the fluke 9040 or Amprobe PRM-6. These testers allow technicians to ensure equipment like pumps and compressors won’t be damaged by incorrect rotation.

## Which direction do motors rotate?

Electric motors are designed either for clockwise rotation, or counter-clockwise, or both. This is very simple. The IEC standard says that the direction of rotation is always viewed from the driven end side, where the load is.

### Is phase rotation clockwise or anti clockwise?

By convention, phase rotation is anticlockwise because that’s how we tend to draw the vectors. Instruments can’t generally tell which phase is which as it’s only doing a comparison – it is up to you to get the leads in the right order for what you are trying to achieve.

#### How do you measure phase rotation with a multimeter?

Rotate the motor shaft clockwise. The tester will display either clockwise or counterclockwise rotation. If the tester shows counterclockwise rotation while turning the shaft clockwise, swap and two of the leads and repeat the test until the tester indicates the correct rotation direction.