Manual Synchronizing Devices

Digital manual synchronizing devices for generator, busbar, and breaker-closing applications, combining voltage / frequency measurement, synchronization visualization, and synchronism-check permissive logic in a modular and engineering-oriented architecture.

Product Capability

A modular manual-synchronizing platform that combines dual-side voltage / frequency measurement, digital synchronization visualization, and independent synchro-check permissive logic for controlled breaker closing.

Dual-side electrical monitoring: WTM10 digital voltage-frequency meters provide clear local measurement of voltage and frequency on the two sides of the synchronizing point.
Visual synchronization guidance: WTM30 provides a digital synchronizing display for comparing the two systems, including voltage difference, frequency difference, and relative phase condition during the approach to synchronism.
Synchronism-check permissive logic: WT Series synchro-check relays evaluate the configured voltage, frequency, and phase-angle conditions and issue a closing-permission output only when the synchronization criteria are satisfied.
Modular or integrated application: the manual synchronizing function can be built from separate WTM10, WTM30, and WT modules, allowing users to configure the panel according to operating habits, cabinet layout, and project philosophy.
Reduced dependence on mechanical synchronoscopes: digital indication improves readability and avoids the fragility, inconsistent accuracy, and maintenance issues associated with traditional moving-pointer synchronizing meters.
Adaptable synchronization logic: ODES synchronizing solutions support project-specific rated-value and phase-shift adaptation, helping accommodate different PT ratios, wiring arrangements, generator systems, and busbar schemes.
Special closing supervision on applicable WT variants: the WT-32 functional variant supports a dedicated dead-bus / dead-line closing mode in addition to normal synchronism-check operation.
Protection-oriented engineering: the synchronism-check function is intended for breaker permissive circuits in power-system environments where deterministic logic, anti-interference performance, and clear commissioning boundaries are required.
Broad application coverage: suitable for generator grid connection, bus coupler / bus-section closing, utility and industrial power plants, marine power systems, captive generation, microgrids, and other manually synchronized breaker applications.

Customer Value

Make manual synchronization safer, clearer, easier to wire, and easier to commission while retaining the familiar operating workflow used by power-plant and utility engineers.

Safer closing decisions: operators receive clear voltage, frequency, and phase information while the synchro-check relay provides an independent permissive boundary before breaker closing.
Easier panel operation: digital displays present the key synchronization quantities directly, reducing reliance on visual interpretation of multiple mechanical meters and simplifying the operator workflow.
Cleaner engineering architecture: the WTM10 + WTM30 + WT functional split creates a repeatable manual synchronizing scheme with clear responsibilities for measurement, visualization, and closing permission.
Lower commissioning complexity: consistent digital indication, configurable thresholds, and project-specific phase / rated-value adaptation reduce the need for improvised compensation and repeated field adjustment.
Better maintainability: modular devices can be tested, replaced, and troubleshot by function, helping maintenance teams isolate whether an issue is related to measurement, synchronizing indication, or permissive logic.
Flexible project standardization: panel builders can retain a familiar manual synchronization operating philosophy while standardizing device layout, wiring logic, documentation, FAT checks, and spare-parts planning.
Scalable upgrade path: conventional modular schemes can coexist with newer integrated ODES manual-synchronizing platforms where a project requires fewer discrete devices and a more consolidated hardware architecture.

Product Series

Product series are configured according to users' usage and configuration preferences.

WTM10 Series

Digital voltage & frequency meter

A panel-mounted digital meter used to monitor the voltage and frequency on one side of the synchronizing point. A conventional ODES manual synchronizing scheme uses two WTM10 units so operators can compare the system side and incoming / generator side simultaneously.

WTM30 Series

Digital synchronizing meter / synchronoscope

Provides a dedicated digital view of the synchronization relationship between the two sides. ODES material identifies voltage difference, frequency difference, and phase relationship as the key displayed synchronization quantities, helping the operator judge the approach to synchronism.

WT Series

Synchronism-check relay (current webpage: WT-31AA; related variant: WT-32)

Provides breaker closing permission only when the configured synchronization conditions are satisfied. WT-32 adds a selectable dead-bus / dead-line supervision mode for special closing conditions; model-specific functionality should be confirmed from the latest manual.

View technical parameters by product series.

WTM10 Series - Digital Voltage & Frequency Meter

Parameter(WTM10 )	Data(WTM10 )	Remarks(WTM10 )
Product model	WTM10 Series	Displayed on the current ODES Manual Synchronizing Devices webpage.
Primary function	Digital AC voltage and frequency measurement	Used as the local measurement element in manual synchronizing panels.
Measured quantities	Voltage + frequency	One WTM10 monitors one side of the synchronizing point.
Typical system quantity	2 units per conventional manual synchronizing point	One for the system / bus side and one for the incoming / generator side.
Display	Dual digital front-panel display	Provides direct numerical indication for operating personnel.
Synchronizing role	Pre-closing comparison of the two electrical systems	Used together with WTM30 and a WT Series synchro-check relay in the classic ODES scheme.
Installation form	Panel-mounted digital meter	Confirm panel cutout, depth, terminal arrangement, and outline drawing for the current model.
Rated voltage input	Model / project dependent	Confirm PT secondary nominal value, input terminals, and allowable range in the latest manual.
Frequency range	Model / project dependent	Confirm nominal 50 / 60 Hz application and measurable range from the current datasheet.
Measurement accuracy	Model / firmware dependent	Use only the latest approved datasheet value in tender and FAT documentation.
Auxiliary supply	Model / order-code dependent	Confirm AC / DC supply and tolerance before design freeze.
Environmental / EMC	Refer to latest approved manual and test scope	Confirm temperature, humidity, altitude, insulation, dielectric withstand, and EMC requirements for the selected order code.

WTM30 Series - Digital Synchronizing Meter

Parameter(WTM30)	Data(WTM30)	Remarks(WTM30)
Environmental / EMC	Refer to latest approved manual / type-test scope	Use verified model-specific values for temperature, humidity, altitude, insulation, and EMC.
Product model	WTM30 Series	Current ODES webpage shows WTM30 as the representative digital synchronizing meter.
Primary function	Digital synchronization visualization / synchronoscope	Provides the operator with a dedicated view of the relationship between the two systems before closing.
Voltage comparison	Voltage difference indication	Used to judge whether the two sides are sufficiently close in voltage magnitude.
Frequency comparison	Frequency difference indication	Used to judge relative frequency before closing.
Phase comparison	Digital / LED phase relationship indication	ODES company material states that the LED indication visually represents phase difference during synchronization.
Slip / approach indication	Visual change with relative frequency / phase movement	Exact display logic and any numeric slip-frequency function are firmware / variant dependent.
System role	Operator synchronization guidance	Typically used with two WTM10 meters and a WT Series synchro-check relay.
Phase-shift / rated-value adaptation	Supported at solution level; model-specific implementation to be confirmed	ODES manual synchronizing solutions support adaptation for different wiring / PT conditions; verify the exact WTM30 setting method in the latest manual.
Rated input	Model / project dependent	Confirm PT secondary voltage and input wiring from the approved datasheet.
Measurement / display accuracy	Model / firmware dependent	Confirm numeric accuracy and resolution before customer-facing publication.
Auxiliary supply	Model / order-code dependent	Confirm supply voltage and tolerance in the current manual.
Installation / dimensions	Panel-mounted; model-specific cutout and depth	Verify outline drawing before cabinet production.

WT Series - Synchronism-Check Relay

Parameter(WT )	Data(WT )	Remarks(WT )
Environmental / insulation	Refer to latest approved manual and type-test scope	Confirm temperature, humidity, altitude, insulation resistance, dielectric withstand, and certification scope.
Contact ratings / timing	Model / order-code dependent	Use latest approved manual values for pickup, reset, output rating, and operating / release time.
Product series	WT Synchronism-Check Relay Series	Current product webpage image identifies WT-31AA; ODES application material also references WT-32.
Primary function	Synchronism-check closing permission	Prevents breaker closing unless the configured synchronization criteria are satisfied.
Comparison criteria	Voltage difference + frequency difference + phase-angle difference	All required criteria must be within the configured limits before the permissive output is issued.
Output function	Breaker closing-permission relay output	Wire the permissive contact into the approved breaker closing / interlocking logic.
WT-32 mode selection	Dry NO DI at terminals 7-8	DI open = normal synchronism-check; DI closed = dead-bus closing detection, according to ODES application guidance.
WT-32 dead-bus criterion	Either side, or both sides, below 0.1 × rated voltage	ODES application example states <10 VAC when the rated reference is 100 V.
WT-32 outputs	OUT1 / OUT2 state change according to scheme	Exact contact form, rating, and logic must be verified in the WT-32 manual / approved schematic.
Synchronizing thresholds	Project-set / model-dependent	Confirm allowable voltage, frequency, and phase-angle differences against the system synchronization philosophy.
Dead-bus / dead-line closing	Available on applicable variants	Treat as a special / backup operating mode and define selector interlocks and commissioning tests clearly.
Mounting form	WT-31AA current webpage image: DIN-rail module	Verify current mechanical drawing and terminal numbering for the ordered variant.
EMC positioning	Protection-grade / Level-4 EMC solution positioning	ODES protective-monitoring solution materials position WT Series for power-system EMC environments; confirm model-specific test evidence.
Auxiliary supply / nominal VT input	Model / order-code dependent	Confirm rated AC inputs, auxiliary power, and wiring before design freeze.

Resources & FAQ

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Frequently Asked Questions

Q1. How should I use WTM10, WTM30, and the WT Series in a manual synchronizing scheme?

These products are complementary rather than direct substitutes. A conventional ODES digital manual synchronizing scheme uses two WTM10 meters to monitor voltage and frequency on the two sides of the synchronizing point, one WTM30 to visualize the synchronization relationship, and a WT Series synchro-check relay to provide the closing-permission signal. Select the final combination according to the breaker scheme, panel operating philosophy, PT inputs, and whether an integrated or modular architecture is required.

Q2. What conditions should be confirmed before a breaker is allowed to close?

Confirm the system-side and incoming-side voltage inputs, nominal frequency, PT ratio and wiring, permitted voltage difference, permitted frequency difference, permitted phase-angle difference, breaker closing time, required phase-shift compensation, and the project rule for live-live versus dead-bus / dead-line closing. The WT Series permissive contact should be wired into the approved closing logic; final thresholds must follow the project protection and synchronization philosophy rather than generic default values.

Q3. Does ODES support dead-bus closing and more highly integrated manual synchronizing devices?

Yes, on applicable variants. ODES official application material identifies WT-32 as a synchro-check relay with a dedicated DI mode-selection input for normal synchronism-check versus dead-bus closing supervision. ODES also publishes MBCR652C and MBCR652M as later integrated manual synchronizing devices. Because the current product-category webpage still displays WTM30, WTM10, and WT-31AA as the representative products, confirm the latest released model, firmware, order code, and manual before quotation or website publication.

The current ODES Manual Synchronizing Devices webpage visually presents WTM30, WTM10, and WT-31AA as the representative product set. ODES company materials describe the classic digital manual synchronizing solution as 2 × WTM10 + 1 × WTM30 + 1 × WT synchro-check relay, while newer official application content also references WT-32 and the integrated MBCR652C / MBCR652M platform. Before final website release, quotation, FAT, or ordering, verify the latest model-specific manual for rated voltage, frequency range, measurement accuracy, permissible synchronization thresholds, output-contact ratings, auxiliary supply, phase-shift settings, dimensions, environmental / EMC performance, firmware behavior, and certification scope.