Phase-sequence relay SL 9059 The phase sequence relays IL/SL 9059 and OA 9059 of the VARIMETER series monitor compliance with the correct phase sequence L1 - L2 - L3 and the presence of the three phase voltages in a three-phase system. Advantages . Protects mobile equipment against damage or destruction coming from wrong phase sequence . OA 9059: Reduced wiring by mounting directly in the motor connection box Features . According to IEC/EN 60255-1 . Detection of incorrect phase sequence . No separately auxiliary voltage necessary . Nominal voltage range 3 AC 380 ... 690 V . Suitable for operation with inverters (f = 40 ... 80 Hz) . Relay output: - IL/SL 9059: 1 changeover contact - OA 9059: 1 NC contact . Extended temperature range . Devices available in 3 enclosure versions: IL 9059: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880 SL 9059: Depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct . OA 9059: Sealed modul with stranded wire connection suitable for mounting in terminal box . Width - IL/SL 9059: 35 mm - OA 9059: 62 mm Technical specifications Width: 35mm Enclosure design: Switch cabinet 1- / 3-phase: 3 Standard measuring range: AC 380 - 690 V Measuring range max.: 690 V Output contacts: 1 C/O contact Type: SL 9059 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: SL9059.11 3AC380-690V 40-80Hz Art. No.: 0065771