DESCRIPTION 
 The 750 and 760 relays contain many features designed to accommodate a wide range of applications. This chapter is pro vided to guide you, the first time user, through a real-world application. The following step-by-step installation example, pro vides you with a quick and convenient way of becoming familiar with the relay. To start, simply power on the unit, and follow the instructions in this tutorial. The example assumes the following system characteristics. It also assumes that relay set points are unaltered from their factory default values.

• Power System Data System: 3Φ, 4 wire Frequency: 60 Hz Line Voltage: 13.8 kV Maximum Current: 600 A
• Control System Requirements All protection elements used are to trip the breaker. Breaker position monitoring via 52b contact only. Only current metering is required. Contact Inputs: Remote open and close contacts from RTU. Remote/local selection from panel hand switch. Reset from RTU. Alarm after 100 second delay from substation monitor Contact Outputs: Trip and close to breaker control circuit (trip and close relays). Relay failure alarm to RTU (self-test warning relay, no programming required). Alarm contact to RTU (setup in User Function for “Substation Monitor”) No data communications to other equipment.
• Instrument Transformer Data Bus VTs: 3 × Wye connected, ratio = 14.4 kV:120 V Phase CTs: 3 × Wye connected, ratio = 600:5 A
• Phase Protection Settings Time Overcurrent 1: Curve Shape = Moderately Inverse; Pickup = 840 A; Multiplier = 20.2 Instantaneous Overcurrent 1: Pickup = 840 A; Phases Required = Any Two; Delay = 0 seconds Instantaneous Overcurrent 2: Pickup = 10100 A; Phases Required = Any Two; Delay = 0 seconds
• Neutral Protection Settings Time Overcurrent 1: curve shape = Moderately Inverse; pickup = 120 A; multiplier = 10 Instantaneous Overcurrent 1: Pickup = 120 A; Delay = 0 seconds Instantaneous Overcurrent 2: Pickup = 2000 A; Delay = 0 seconds You should now be familiar with maneuvering through and editing setpoint messages. As such, we