A9C30212 Schneider Impulse Relay

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1SFA898114R7000 PSTX300-600-70 Softstarter

The softstarter PSTX300-600-70 has a rated maximum operational current of 300 A with an operating voltage span from 208...600 V AC. The rated control voltage is between 100...250 V AC at 50/60 Hz. PSTX features a three-phase control soft start and stop through a voltage or a torque ramp. It has built-in bypass for easy installation and energy saving. A RUN, TOR and Event signal is available from relay outputs in NO (normally open state). The PSTX has functions such as current limit, kickstart, analog output, EOL, motor heating and pump cleaning. PSTX also features features jog, braking, stand-still brake, diagnostics, sequence start and emergency/fire pump mode as standard.To interact with PSTX, it has a detachable full graphic display with IP66 and 4x outdoor rating. There are four ways to communicate with PSTX. It can be done by hardwire inputs Start/Stop/Reset of fault, and by three programmable digital inputs. Another popular option is the built-in Fieldbus communication Modbus RTU and incl optional ANYBUS modules with every major protocol such as for example Profinet, Profibus, Modbus TCP, Ethernet IP and others. Another way to communicate with PSTX is to use an external adaptor and a Fieldbus plug. PSTX is the complete alternative for any motor starting application. It’s suitable for medium to large-sized three-phase motors with nominal currents from 30...1250 A inline connection or 52...2160 A inside delta connection. Typical applications are, for example, pumps, fans, compressors, and conveyors. 

Specifications of 1SFA898114R7000 PSTX300-600-70

Rated Operational Voltage:208 ... 600 V AC
Rated Control Supply Voltage (Us):100 ... 250 V AC
Rated Control Circuit Voltage (Uc):24 V DC
Rated Frequency:(f)50/60 Hz
Main Circuit Frequency:50 / 60 Hz
Rated Operational Power - In-Line Connection (Pe):(230 V) 90 kW
(400 V) 160 kW
(500 V) 200 kW
Rated Operational Current - In-Line Connection (Ie):300 A
Rated Operational Power - Inside Delta Connection:(230 V) 160 kW
(400 V) 257 kW
(500 V) 355 kW
Rated Operational Current - Inside Delta Connection:515 A
Service Factor Percentage:100 %
Overload Protection:Built-in electronic overload protection
Integrated Electronic Overload:Yes
Starting Capacity at Maximum Rated Current Ie: 4 × Ie for 10 s
Ramp Time:1 ... 120 s

FAQ of 1SFA898114R7000 PSTX300-600-70

Q:Can I use the PSTX300 with a 600 V system?
A:Yes. The rated operational voltage is 208 ... 600 V AC. However, power ratings are only listed up to 500 V. For 600 V operation, you must derate or consult the full manual for 600 V power tables.
Q:Do I need an external overload relay?
A:No. The PSTX300 has built-in electronic overload protection. This eliminates the need for a separate thermal overload relay.
Q:What is the degree of protection?
A:The main terminals are rated IP00 (open, no enclosure protection).
The device must be installed inside an enclosure (minimum IP20) for safety.

Technical Notes

In In-Line mode, the soft starter current is the limiting factor (300 A max).
In Inside Delta mode, the soft starter conducts only 58% of line current, allowing higher motor power from the same device.
Motor must have all 6 terminals accessible (U1, V1, W1, U2, V2, W2).
Motor must be configured for delta run (not star).
The soft starter is wired between the motor terminals, not between mains and motor.