NORD NORDAC SK700E Modules

Technical Dossier

Product Details And Specifications

NORD NORDAC SK700E Series: Comprehensive Module Range and Technical Overview

The NORDAC SK700E is a compact, field-proven variable frequency drive (VFD) series manufactured by Getriebebau NORD GmbH & Co. KG (NORD Drivesystems), Germany. Deployed across global heavy industry — including petrochemical plants, offshore platforms, nuclear auxiliary systems, pulp & paper mills, and water treatment facilities — the SK700E occupies a critical position in the installed base of distributed drive systems. Its DIN-rail and panel-mount form factor, combined with a wide input voltage range (3-phase 200–480 V AC), made it a default specification for OEM machine builders throughout the 2000s and 2010s. Many installations remain in active service, creating sustained demand for exact-replacement spare units.

The Evolution of SK700E Architecture

The SK700E was introduced as a successor to the SK700 series, incorporating an enhanced EMC filter stage, integrated brake chopper (on select variants), and expanded fieldbus option slots. The model string encodes the full hardware configuration: power class, voltage rating, brake/filter options, and communication interface. Early production units (pre-2010) used a discrete IGBT gate driver board; later revisions consolidated this onto a single control PCB, improving MTBF but creating cross-revision compatibility constraints. The SK700E shares mechanical mounting dimensions with the SK750E and SK755E in the NORDAC FLEX family, but the control firmware and parameter sets are not interchangeable. As of 2024, NORD has transitioned primary development to the NORDAC FLEX SK 200E and NORDAC LINK SK 250E platforms. The SK700E is in the mature/end-of-active-production phase; NORD continues to supply spare units through its distribution network, but lead times for low-volume power classes have extended. Long-term maintenance planning for SK700E-based installations should account for this lifecycle position.

SK700E Full Catalog & Functionalities (SKU List)

The following SKUs represent the core of the SK700E range, organized by functional category. Each model number follows the NORD part-number convention encoding power, voltage, and option codes.

Compact Drive Units — 200–240 V Class (1-phase / 3-phase input)

• SK700E-111-100-A: 0.25 kW, 1-phase 230 V input, 3-phase output, no brake chopper, standard enclosure
• SK700E-112-100-A: 0.37 kW, 1-phase 230 V input, integrated EMC filter, compact chassis
• SK700E-113-100-A: 0.55 kW, 1-phase 230 V input, suitable for conveyor and pump duty
• SK700E-114-100-A: 0.75 kW, 1-phase 230 V input, DIN-rail mountable, IP20
• SK700E-115-100-A: 1.1 kW, 1-phase 230 V input, integrated brake chopper option

Standard Drive Units — 380–480 V Class (3-phase input)

• SK700E-111-340-A: 0.25 kW, 3-phase 400 V, standard I/O, no fieldbus
• SK700E-112-340-A-GBB-EL: 0.37 kW, 3-phase 400 V, integrated brake chopper (GBB), EMC filter class C2 (EL), standard analog/digital I/O — this listing's primary SKU
• SK700E-113-340-A: 0.55 kW, 3-phase 400 V, general-purpose pump and fan control
• SK700E-114-340-A: 0.75 kW, 3-phase 400 V, panel-mount, IP20
• SK700E-115-340-A: 1.1 kW, 3-phase 400 V, suitable for light conveyor duty
• SK700E-121-340-A: 1.5 kW, 3-phase 400 V, extended I/O terminal block
• SK700E-122-340-A: 2.2 kW, 3-phase 400 V, standard chassis, DIN-rail
• SK700E-123-340-A: 3.0 kW, 3-phase 400 V, mid-range conveyor and compressor duty
• SK700E-131-340-A: 4.0 kW, 3-phase 400 V, heavier pump/fan applications
• SK700E-132-340-A: 5.5 kW, 3-phase 400 V, integrated brake chopper standard
• SK700E-133-340-A: 7.5 kW, 3-phase 400 V, panel-mount, suitable for mixer and agitator duty
• SK700E-134-340-A: 11 kW, 3-phase 400 V, larger chassis, external brake resistor terminal
• SK700E-135-340-A: 15 kW, 3-phase 400 V, high-inertia load applications
• SK700E-141-340-A: 18.5 kW, 3-phase 400 V, industrial fan and pump, IP20 panel-mount
• SK700E-142-340-A: 22 kW, 3-phase 400 V, upper range of the SK700E chassis family

Option Code Reference (suffix decode)

• GBB: Integrated brake chopper with external brake resistor connection
• EL: Built-in EMC line filter, Class C2 (EN 61800-3)
• BUS: Fieldbus option slot populated (PROFIBUS DP, CANopen, or DeviceNet depending on sub-variant)
• IP: Enhanced ingress protection variant (IP55 or IP65 enclosure)

Sourcing Hard-to-Find & Obsolete SK700E Parts

DriveKNMS maintains a dedicated inventory of SK700E units across the full power range, including low-volume variants that have exited standard distribution channels. For installations where the SK700E is embedded in a larger NORD gear-motor assembly or integrated into a legacy SCADA architecture, a like-for-like replacement is the lowest-risk maintenance path. DriveKNMS sources units from decommissioned OEM lines, factory overstock, and authorized secondary-market channels. All units are cross-referenced against NORD's internal revision history to confirm hardware compatibility with the target installation's firmware version. For sites requiring long-term supply agreements — common in nuclear auxiliary, water infrastructure, and chemical processing — DriveKNMS can structure blanket purchase orders with defined lead-time commitments.

Quality Control for the SK700E Range

Each SK700E unit processed by DriveKNMS undergoes a structured verification protocol before dispatch. Power stage testing applies rated input voltage (230 V or 400 V class as applicable) and verifies output waveform symmetry across all three phases under resistive load. The integrated brake chopper (GBB variants) is exercised through a dynamic braking cycle to confirm IGBT switching integrity and thermal cutback thresholds. Control board I/O is verified against the factory terminal assignment: analog input linearity (0–10 V, 4–20 mA), digital input response time, and relay output contact resistance. For units with fieldbus option cards, bus communication is validated using a protocol-specific master simulator. Units that fail any stage are quarantined and not relisted. Test records are retained and available on request for regulated-industry procurement.