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- SEP888 59705
- Base Unit
- France
- 222 × 264 × 89.7 mm
- 4.22 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Schneider SEP888 59705 Sepam Series 80 Base Unit is a protection and measurement system base unit used within Schneider Electric Sepam Series 80 installations. It forms the central hardware platform for integrating protection, measurement, communication, and control functions in medium-voltage electrical distribution systems.
In a switchgear or substation panel, the base unit provides the hardware foundation for a Sepam protection arrangement. It works with the associated protection and measurement components to collect electrical system information and support the configured protection functions.
Sepam Series 80 equipment is commonly applied where electrical feeders, transformers, motors, generators, and other medium-voltage assets require dedicated monitoring and protection. The base unit is therefore normally part of a broader protection system rather than an independent measurement device.
During maintenance, the SEP888 59705 should be evaluated together with the connected Sepam components, current and voltage measurement circuits, communication interfaces, and protection settings. Correct system configuration is essential when replacing a base unit in an operating protection installation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Model | SEP888 59705 |
| Product Family | Sepam Series 80 |
| Product Type | Base Unit |
| Primary Function | Protection-system hardware platform |
| System Role | Electrical protection and monitoring infrastructure |
| Application | Medium-voltage electrical distribution protection |
| Dimensions | 222 × 264 × 89.7 mm |
| Weight | 4.22 kg |
Product Features
- Sepam Series 80 base unit for electrical protection applications.
- Provides the hardware foundation for a configured Sepam protection system.
- Suitable for medium-voltage distribution and industrial power systems.
- Supports integration with protection, measurement, and communication functions.
- Applicable to feeder, transformer, motor, and other electrical equipment protection schemes.
- Can be integrated into switchgear and substation control panels.
- Supports local and system-level monitoring through the associated Sepam architecture.
- Useful for maintenance and replacement of compatible Sepam Series 80 installations.
Working Principle
The SEP888 59705 functions as the base hardware platform around which the Sepam protection system is assembled. Electrical measurements and status information from the protected installation are made available to the Sepam system through the appropriate measurement and interface components.
The configured protection system evaluates these electrical conditions against its protection functions. When an abnormal condition meets the configured criteria, the Sepam system can initiate the appropriate alarm, indication, or protective control action.
Electrical Network → Measurement / Interface Components → Sepam Series 80 Base Unit → Protection Functions → Alarm / Trip / Control
The base unit itself should not be treated as a standalone protection algorithm. Its role is to support the Sepam system hardware and the associated protection, measurement, communication, and control functions.
Role in a Sepam Series 80 Protection Architecture
The SEP888 59705 occupies the central hardware layer of a Sepam Series 80 protection installation. It connects the protection-system hardware with the electrical measurements, control circuits, communication equipment, and switchgear functions required by the application.
Power System → CT / VT Measurement → Sepam Series 80 System → Protection Logic → Trip Circuit → Circuit Breaker
| System Element | Function |
|---|---|
| Medium-Voltage Network | Provides the electrical system being monitored |
| CT / VT Measurement | Supplies current and voltage information |
| SEP888 59705 | Provides the Sepam Series 80 base hardware platform |
| Protection Functions | Evaluates electrical conditions and configured limits |
| Communication Interface | Exchanges protection and measurement information |
| Trip Circuit | Transfers protective commands to the switching equipment |
| Circuit Breaker | Disconnects the protected circuit when a trip is initiated |
| Supervisory System | Provides higher-level monitoring and operational visibility |
The protection architecture depends on the correct interaction between the base hardware, measurement circuits, protection configuration, and external switching equipment.
Industrial Applications
| Application | Typical Use |
|---|---|
| Medium-Voltage Feeders | Protection and monitoring of distribution feeders |
| Transformer Protection | Monitoring and protection of transformer circuits |
| Motor Protection | Protection of medium-voltage motor feeders |
| Generator Systems | Electrical monitoring and protection |
| Industrial Switchgear | Protection and control within switchgear assemblies |
| Electrical Substations | Feeder and equipment protection |
| Utility Distribution | Monitoring and protection of distribution circuits |
| Industrial Power Networks | Centralized protection and measurement functions |
Installation and Maintenance
- Verify that the SEP888 59705 is compatible with the intended Sepam Series 80 protection configuration.
- Isolate the applicable electrical equipment and follow the site’s protection-system safety procedures before maintenance.
- Record the existing Sepam hardware arrangement, wiring, communication connections, and protection configuration before replacement.
- Inspect the base unit and associated connectors for physical damage or contamination.
- Confirm that current and voltage measurement circuits are identified correctly before reconnecting the protection system.
- Install the base unit securely according to the approved switchgear or panel arrangement.
- Reconnect associated protection, communication, auxiliary, and control wiring according to the documented configuration.
- Verify that the configured protection settings and system parameters correspond to the intended protected equipment.
- Energize the protection system under controlled conditions and check system status and diagnostic indications.
- Verify measurement values and communication with connected monitoring or supervisory equipment.
- Perform appropriate protection and trip-circuit tests according to the approved commissioning procedure.
- After replacement, confirm protection functions, alarms, communication, and circuit-breaker trip operation before returning the protected equipment to service.
Compatible System Components
| Component | Function |
|---|---|
| Schneider Sepam Series 80 | Electrical protection and monitoring platform |
| Current Transformers | Provide current measurements for protection functions |
| Voltage Transformers | Provide voltage measurements where required |
| Circuit Breaker | Performs switching and protective disconnection |
| Trip Circuit | Transfers protective commands to the breaker |
| Switchgear | Houses and operates the protected electrical equipment |
| Communication Interface | Exchanges protection and monitoring information |
| Operator / Supervisory System | Provides monitoring, diagnostics, and operational control |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Schneider Sepam Series 80 | Protection Relay Family | Medium-voltage protection |
| Schneider Sepam Series 80 Base Units | Protection System Hardware | Sepam protection-system integration |
| Schneider Sepam Series 40 | Protection Relay Family | Distribution and equipment protection |
| Schneider Sepam Series 20 | Protection Relay Family | Basic electrical protection |
| Schneider PowerLogic | Power Monitoring Family | Electrical measurement and monitoring |
| Schneider MasterPact / Compact | Circuit Breaker Family | Electrical switching and protection |
| Schneider Modicon | Automation Platform | Industrial control and automation |
Key Advantages
- Provides a central hardware foundation for Sepam Series 80 protection systems.
- Supports integration of electrical protection and measurement functions.
- Suitable for medium-voltage feeders, transformers, motors, and industrial power equipment.
- Fits switchgear and substation protection architectures.
- Supports coordination between measurement, protection, communication, and trip functions.
- Useful for maintenance and replacement of compatible Sepam Series 80 installations.
Technical FAQs
What role does the SEP888 59705 play in a Sepam protection system?
The SEP888 59705 serves as the base hardware platform for the Sepam Series 80 protection arrangement. The complete protection function depends on the associated measurement, protection, communication, and control components.
Can the base unit determine whether a circuit breaker should trip?
The protective decision belongs to the configured Sepam protection functions and system logic. The base unit supports the hardware required for those functions, while the complete protection system evaluates electrical conditions and issues the appropriate command.
What should be documented before replacing a Sepam base unit?
The existing hardware arrangement, wiring, measurement connections, communication interfaces, and protection configuration should be recorded. This helps ensure that the replacement reproduces the intended protection-system arrangement.
Why should trip testing be performed after replacement?
A protection system can appear operational while a wiring or configuration problem still prevents the trip command from reaching the circuit breaker. Verifying the complete protection and trip path confirms that the system can perform its intended protective function.