Schneider SEPAM 1000-S40 Digital Protection Relay

Overview

The Schneider Electric SEPAM 1000 S40 is a reliable digital protection relay designed for medium-voltage power distribution systems. It provides comprehensive protection, measurement, and monitoring functions to ensure high system reliability and operational safety. The relay offers precise current and voltage protection, fault detection, and system diagnostics—ideal for industrial and utility applications where uptime and protection accuracy are critical.

Moreover, the SEPAM 1000 S40 simplifies protection management with its intuitive LCD interface, configurable LED indicators, and PC-based setup via SFT2841 software. Its modular design enables flexible integration into existing switchgear systems, making it a preferred choice for feeders, motors, and transformers.

Key Functional Highlights

• Comprehensive Protection: Includes overcurrent, short-circuit, and voltage protection for all operating conditions.

• Real-Time Monitoring: LCD display provides instant access to measurements, alarms, and system events.

• User-Friendly Configuration: Configurable through SFT2841 software with secure password access.

• Reliable Diagnostics: Built-in event logs, LED indicators, and trip recording enhance system visibility.

• Flexible Integration: Suitable for feeders, transformers, and motor applications in medium-voltage networks.

Technical Specifications

General

• Model: SEPAM 1000 S40

• Series: SEPAM 40

• Type: Digital protection relay

• Mounting: Panel-mounted modular design

• Frequency: 50/60 Hz

Protection Functions

• Current Protection: Overcurrent (CO), long-time overcurrent (LCO), short-circuit

• Voltage Protection: Overvoltage (OV), undervoltage (UV), zero-sequence voltage (59V0)

• Additional: Ground fault and directional protection (configurable)

Interface and Display

• LCD Screen: Displays real-time data, alarms, and trip history

• LEDs: 9 customizable yellow LEDs for status/trip indication

• Control Buttons: For navigation, reset, and alarm acknowledgment

• Labels: Replaceable LED identification tags

Configuration and Communication

• Configuration Software: SFT2841

• Communication: PC connection for setup and diagnostics

• Security: Password-protected settings (default: 0000)

• Adjustable Parameters: CT/PT ratios, protection curves, control logic, I/O testing

Environmental and Mechanical

• Operating Frequency: 50/60 Hz

• Language Options: English, Traditional Chinese

• Fault Indicator: Red LED for internal errors

• Manual Controls: Dedicated reset and alarm clear buttons

Typical Applications

The SEPAM 1000 S40 relay is widely used in:

• Feeder Protection: Prevents overcurrent and short-circuit events in distribution feeders.

• Transformer Protection: Detects abnormal voltage and current conditions.

• Motor Protection: Guards against phase loss, overloads, and ground faults.

• Industrial Power Systems: Suitable for refineries, manufacturing plants, and utility substations.

Therefore, it delivers dependable protection across multiple electrical distribution assets, ensuring continuity and safety.

Support and Maintenance

Schneider Electric provides long-term support for SEPAM series relays. The SFT2841 software simplifies maintenance by allowing engineers to update configurations, test protection functions, and download event records. Regular firmware updates ensure compatibility with evolving system requirements.

FAQ

Q1: What software is used to configure the SEPAM 1000 S40?
A1: It uses Schneider Electric’s SFT2841 software for configuration and diagnostics.

Q2: Can the LED indicators be customized?
A2: Yes, each LED can be labeled and configured to display specific status or trip conditions.

Q3: Is the SEPAM 1000 S40 suitable for transformer and motor protection?
A3: Yes, it supports feeder, transformer, and motor protection with configurable logic.

Q4: How can users access protection settings securely?
A4: A password is required for configuration access. The default password is 0000.

Q5: What languages are supported on the interface?
A5: The relay supports both English and Traditional Chinese language options.