![[LS ELECTRIC] — Metasol MMS RU Undervoltage Release Trip (6 Voltages)](https://img.prosourcemro.com/2026/04/001-1511-1024x731.png)
Accessories
LS ELECTRIC
[LS ELECTRIC] — Metasol MMS RU Undervoltage Release Trip (6 Voltages)
Family ID: LSE-MMS-ACC-RU
RU Undervoltage Release — trips Metasol MMS when supply voltage drops below threshold. Pickup 0.85~1.1×Us, drop-out 0.7~0.35×Us. Right side-mount, single unit. 6 voltages available. Opening time 20ms. WARNING: if undervoltage persists, operating MMS may briefly energize main contacts; resolve undervoltage first. Mutually exclusive with RS and RUX.
6 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| RU-AC24 | RU Undervoltage Release, 24V 50Hz / 28V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 24V 50Hz / 28V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. | ||
| RU-AC110 | RU Undervoltage Release, 110V 50Hz / 120V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 110V 50Hz / 120V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. | ||
| RU-AC220 | RU Undervoltage Release, 220-230V 50Hz / 240-260V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 220-230V 50Hz / 240-260V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. | ||
| RU-AC240 | RU Undervoltage Release, 240V 50Hz / 277V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 240V 50Hz / 277V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. | ||
| RU-AC380 | RU Undervoltage Release, 380-400V 50Hz / 440-460V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 380-400V 50Hz / 440-460V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. | ||
| RU-AC415 | RU Undervoltage Release, 415-440V 50Hz / 460-480V 60Hz | LS ELECTRIC | Type: Undervoltage Release (RU) | Function: Trips MMS when supply voltage drops | Mount: Right side-mount (single unit only) | Operating Voltage: 415-440V 50Hz / 460-480V 60Hz | Compatible MMS: All Metasol MMS frames (32/63/100AF, S/H/HI) | Pickup Voltage: 0.85~1.1 × Us | Drop-out Voltage: 0.7~0.35 × Us | Inrush Power: 8.5VA / 6W | Holding Power: 3VA / 1.2W | Opening Time: 20ms | Weight: 110g | Mutual Exclusion: Cannot be installed simultaneously with RS or RUX | Warning: If undervoltage condition persists, MMS may briefly energize main contacts when operated. Resolve undervoltage before operating MMS. |
