# Phase Rotation Tester Module, SM852B, 60-600V, three-phase

> Compact SM852B phase rotation tester for three-phase systems, input voltage 60-600V AC, frequency 20Hz-400Hz. Checks phase sequence and detects a missing phase using crocodile clips. Green LED with intermittent beep indicates correct rotation, red LED with continuous beep indicates reverse rotation. Cable and probe length 80 cm, weight 135 g, dimensions 80 x 60 x 24 mm. Includes 3 crocodile clips and a carrying case.

- Page: https://sigmanortec.ro/en/phase-rotation-tester-module-sm852b-60-600v-three-phase
- Price: 94.90 RON
- Availability: In stock; 1-2 zile
- Reference: 88047 · EAN: 5942806779108
- Category: Electronic components > Testing and Measurement
- Specifications: Input Voltage: 60 - 600 V; Input Voltage Type: AC
- Package (shipping data): 0.239 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 06:34 (Europe/Bucharest)

## Description

Compact tester for three-phase systems 60-600V, quickly checks the phase sequence and detects missing phase. Secure connection with crocodile clips, immediate interpretation by LEDs and buzzer, green with intermittent beep for correct rotation and red with continuous beep for reverse rotation. Easy to carry, with instructions printed on the case.
SM852B phase rotation tester, compact, designed for checking phase sequence and detecting open phases in three-phase electrical systems.
The module combines two essential functions in a single unit: it indicates both the correctness of the phase order and any interruptions.
With the help of crocodile clips, the connection to the control panel is made quickly and safely. The LED indicators and acoustic signals allow for immediate interpretation of the results, making it ideal for technicians and electricians.
Key information related to the interpretation of light and acoustic signals is printed directly on the housing, to always be at hand when taking measurements.
Specifications:
Model: SM852B
Operating voltage: 60V–600V AC three-phase
Voltage limit support: 2000V/minute (4000V impulse)
Operating frequency: 20Hz–400Hz
Continuous use time: max. 60 min at 60V AC / max. 4 min at 600V AC
LED phase sequence indicator: green for correct phase (intermittent beep), red for reversed phase (continuous beep)
Cable and probe length: 80 cm
Device weight: 135 g
Dimensions: 80 x 60 x 24 mm
Use:
Elements
Function
LED U (L1 / R)
Indicates the presence of phase U (phase 1)
LED V (L2 / S)
Indicates the presence of phase V (phase 2)
LED W (L3 / T)
Indicates the presence of phase W (phase 3)
Green LED (CW)
Correct phase sequence (clockwise rotation), intermittent buzzer
Red LED (CCW)
Phase sequence reversed (counterclockwise rotation), continuous buzzer
Red, yellow, green yarn
Connection to the phases of the three-phase installation (L1, L2, L3)
Connect the crocodile clips to the terminals of the three-phase installation or to the terminals of the motor when it is stopped but is supplied with voltage. When you connect the tester wires to the terminals of the three-phase installation, each LED lights up if the corresponding phase is active. If an LED does not light up, it means that the corresponding phase is missing or interrupted.
Green LED + flashing beep: phase sequence is correct.
Red LED + continuous beep: phase sequence is reversed.
The device will also indicate if one of the phases is open.
Turn off the device after checking and store it in the included carrying case.
Content:
1 x SM852B Phase Indicator Tester
3 x Crocodile clips
1 x Carrying case