Protection Relays Voltage Monitoring Relays 350 SERIES 3-phase voltage/phase monitor Description The 350 series is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480 V controls are used. Since the 350 series uses heavy-duty relays, it comes in fixed voltage range models rather than a dual auto-ranging version like the model 250. The 350200 has a 15 A general purpose contact. The 350400 provides a SPDT (Form C) relay rated to switch up to 600 V, allowing the use of 480 V controls, eliminating the need for a control power transformer to step the voltage down to 120240 V. Several DPDT (two Form C contacts) relay models are also available. The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available. Wiring Diagram Features & Benefits FEATURES BENEFITS Proprietary Constantly monitors 3 phase voltage to protect microcontroller against harmful line conditions, even before the based circuitry motor is started Provides diagnostics which can be used for Advanced LED indication troubleshooting and to determine relay status Adjustable restart delay Allows staggered start up of multiple motors, after (-2 models) settings a fault, to prevent a low voltage condition 600 V rated relay Eliminates the need for a control transformer to step contacts available voltage down to 120240 V for a control circuit on some models Ordering Information MODEL LINE VOTAGE DESCRIPTION MODEL LINE VOTAGE DESCRIPTION DPDT, 2 relays (1)10a. (1) 15 A fixed trip and 350200 190240 V ac SPDT, fixed trip and restart delay 35040026 380480 V ac variable restart delay (manual, 2300s) SPDT, fixed trip and variable restart delay DPDT, 2 relays 15 A variable restart delay 3502002 190240 V ac 35040028** 380480 V ac (manual, 2300 s) (no manual reset) DPDT, 2 relays (1)10a. (1) 15 A fixed trip and SPDT, fixed trip and variable restart delay 35020026 190240 V ac 35040029 380480 V ac variable restart delay (manual, 2300 s) (manual, 2300 s), plus high voltage detection DPDT, 2 relays 15 A variable restart delay 35020028** 190240 V ac 350600 475600 V ac SPDT, fixed trip and restart delay (no manual reset) SPDT, fixed trip and variable restart delay SPDT, fixed trip and restart delay 35020029 190240 V ac 3506002 475600 V ac (manual, 2300 s), plus high voltage detection (manual, 2300 s) DPDT, 2 relays (1)10a. (1) 15 A fixed trip and 350400 380480 V ac SPDT, fixed trip and restart delay 35060026 475600 V ac variable restart delay (manual, 2300 s) SPDT, fixed trip and variable restart delay DPDT, 2 relays 15 A variable restart delay 3504002 380480 V ac 35060028** 475600 V ac (manual, 2300 s) (no manual reset) DPDT, fixed trip and variable restart delay SPDT, fixed trip and variable restart delay 35040025 380480 V ac 35060029 475600 V ac (manual, 2300 s) (manual, 2300 s), plus high voltage detection ** These units are not equipped with Manual Reset. 2020 Littelfuse, Inc. Rev: 1-A-062716Rev: 2-A-061220 wwwwww.littelfuse.com/350.littelfuse.com/Protection Relays Voltage Monitoring Relays 350 SERIES General Characteristics Specifications Ambient Temperature Range Input Characteristics Operating -40 to 70C (-40 to 158F) Line Voltage Storage -40 to 80C (-40 to 176F) 350200 190240 V ac Trip & Reset Accuracy 1 % 350400 380480 V ac Maximum Input Power 5 W 350600 475600 V acC Terminal Frequency 50*/60 Hz Torque 7 in.-lbs. Functional Characteristics Wire Size 1218 AWG Low Voltage (% of setpoint) Transient Protection Trip 90 % (Internal) IEC 61000-4-5 1995 6 kV Reset 93 % Safety Marks Voltage Unbalance (NEMA) UL UL 508 (File E68520) Trip 6 % CSA 22.2 No. 14 (File 46510) Reset 4.5 % Dimensions H 74.42 mm (2.93) W 133.86 mm (5.27) Trip Delay Time: D 74.93 mm (2.95) Low Voltage 4 seconds Weight 1.05 lbs. (16.8 oz., 476.27 g) Unbalance & Phasing Faults 2 seconds Mounting Method 8 screws Restart Delay Time Special Options After a Fault 2 seconds Opt. 2: Variable Restart Delay Manual, 2300 seconds adj. After a Complete Power Loss 2 seconds Opt. 5: DPDT Relay Output Characteristics Opt. 6: 2 Relays (1) 10 A, (1) 15 A Output Contact Rating Opt. 8: 2 Relays (2) 15 A SPDT (350200) Opt. 9: High Voltage Pilot Duty 480 VA 240 V ac (% of setpoint) General Purpose 15 A Trip 110 % SPDT (350-400, 350-600) 470 VA 600 V ac Reset 107 % DPDT (-6 Option) 110 A General Purpose 480 VA 240 V ac Pilot Duty *Note: 50 Hz will increase all delay timers by 20 %. 115 A General Purpose 480 VA 240 V ac Pilot Duty 1 hp 240 V ac DPDT (-8 Option) 215 A General Purpose 480 VA 240 V ac Pilot Duty 1 hp 240 V ac 2020 Littelfuse, Inc. Rev: 1-A-062716Rev: 2-A-061220 wwwwww.littelfuse.com/.littelfuse.com/350