ODES TSB-14 Testblock Configuration Made Simple

TonyZhang
Oct 9
3 min read

In overseas projects, Testblocks are essential for safe and standardized protection testing. Engineers often ask the same question:

“How do I configure a Testblock that meets the site’s needs but still controls cost?”

This guide, based on the ODES TSB-14 series and field experience, gives a clear and practical way to plan configurations—from concept to procurement—so you can build the right test set quickly and economically.

1. Understanding the Structure

The TSB-14 uses a 14-module architecture. Each front-panel label matches its internal module type:

Orange modules: current circuits
White modules: voltage or signal circuits

The standard internal layout follows this order: Current → Voltage → Power → Trip → Signal

Recognizing this pattern allows engineers to interpret the model code directly and visualize the internal layout at a glance.

2. Learn the “Module Language”

Each letter or number in the model code represents a functional module:

AB – single-phase current
AAAB – three-phase current
22 / 2222 – single-phase / three-phase voltage
1 – trip, signal, or power circuit
O – test-point signal or power circuit for relays with built-in test contacts

Once you understand these “building blocks,” you can design your own configuration by stacking modules for the exact test functions required.

3. Three Typical Scenarios and How to Configure

Scenario A — Commissioning and Energized Measurement

Goal: Safe plug-in testing of three-phase current and PT voltage, quick switching, and isolation. Configuration Tips:

Prioritize current modules (AAAB)
Add single or three-phase voltage modules (22/2222)
Reserve positions for trip or signal modules (1) Handle: Use FT-14-R (standard type) if relay test contacts are not required.

Scenario B — Maintenance and Multi-Site Use

Goal: Minimize the number of model types while covering multiple voltage levels and device brands. Configuration Tips:

Within 14 modules, balance current, voltage, signal, and trip positions.
Use color coding (orange for current, white for voltage/signal) to reduce human error during site work.

Scenario C — Protection Relay Testing and Interactive Simulation

Goal: Directly connect relay test points through the Testblock to enable safe and controlled injection and interlocking. Configuration Tips:

Start the model code with O to represent the test-point circuit.
Combine with AB / AAAB (current), 22 / 2222 (voltage), and 1 (trip/signal/power) modules. Handle: Always use FT-14-S, which matches “test-contact-first” logic.

4. How to Read a Model Code Example

Model: TSB-14-AAAB2222111111

AAAB → three-phase current
2222 → three-phase voltage
111111 → trip/signal/power circuits

This sequence reflects the standard logic: Current → Voltage → Power → Trip → Signal — which also simplifies inspection, wiring, and factory acceptance testing.

5. Cost-Control Tips — The “Four Checks”

Check the scenario:
Check the order: Always maintain the standard layout Current → Voltage → Power → Trip → Signal for future expandability and inspection ease.
Check the color: Orange = current, white = voltage/signal—simple color verification prevents wiring errors.
Check universality: Use the base combination AAAB + 2222 for universal coverage; configure the remaining slots (1 / O) according to project flexibility.

6. Recommended Standard Models

Based on engineering practice:

TSB-14-AAAB2222111111 – standard for most protection testing.
TSB-14-OAAAB2222111111 – for devices with test-contact priority.
TSB-14-AAAB222211O111 – optimized for mixed testing and trip supervision.

Understanding the module logic of the TSB-14 turns what once felt like custom engineering into a straightforward selection exercise. By following a few simple rules—sequence, color, and scenario—you can configure a Testblock that saves both engineering time and budget while meeting all site testing needs.

Design your next test set with precision and confidence.

Request a configuration sheet for TSB-14 and sample model recommendations.
Consult our engineers to verify your scenario and module layout before procurement.
Standardize your Testblock fleet across projects for consistent operation and easier maintenance.

Contact: 📩 tonyzhang@odes.com.cn

Or visit: 🌐 https://www.odes-electric.com/

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