NORD SK700E-112-340-A-GBB-BY Ruggedized Inverter Drive Module

Product Overview

NORD SK700E-112-340-A-GBB-BY Ruggedized Inverter Drive Module for Harsh Industrial Environments

The NORD SK700E-112-340-A-GBB-BY is a high-performance, ruggedized frequency inverter from NORD Drivesystems’ proven NORDAC SK700E series, engineered to deliver continuous, reliable variable-speed motor control in the most demanding industrial environments. Rated at 11.2 kW with a 400 V three-phase input and an integrated brake chopper (GBB), this drive is purpose-built for applications where uptime is non-negotiable and environmental stressors — high ambient temperature, humidity, airborne particulates, mechanical vibration, and electromagnetic interference — are constant operational realities.

NORD Drivesystems has engineered the SK700E platform with a compact, panel-mount form factor and a robust power stage that tolerates wide input voltage fluctuations without derating. The integrated brake chopper eliminates the need for an external braking unit in most applications, reducing cabinet footprint and simplifying wiring in space-constrained control enclosures. The -BY suffix denotes the factory-fitted bypass option, enabling seamless switchover to direct-on-line motor operation during drive maintenance — a critical feature for continuous-process industries where stopping the line is not an option.

Rugged Specifications Table

Comprehensive Protection Solutions

In a fully integrated drive and control architecture, the SK700E-112-340-A-GBB-BY operates as the motion-control core within a broader system of protective and communicative components. On the power input side, a properly rated NORD SK TU3-340 line reactor or equivalent input choke suppresses voltage spikes and reduces harmonic distortion on the supply bus — essential in facilities where multiple large drives share a common distribution panel. Upstream, a NORD SK BRE4 braking resistor can be connected to the internal brake chopper terminal to dissipate regenerative energy during rapid deceleration of high-inertia loads such as centrifuges or overhead cranes.

For fieldbus integration into a Siemens S7-300 or S7-1500 PLC system, the optional NORD SK TIE4-PBR PROFIBUS DP module or the SK TIE4-PNT PROFINET IO adapter slots directly into the SK700E’s fieldbus interface bay, enabling full parameter access and real-time speed/torque control from the PLC without additional gateway hardware. In installations using a Siemens ET 200SP distributed I/O rack or a Beckhoff EK1100 EtherCAT coupler, the drive’s analog and digital I/O terminals can be wired directly to the remote I/O modules, providing local override capability independent of the fieldbus.

Motor protection is reinforced by pairing the SK700E with a NORD SK TU3-PTC thermistor evaluation module, which monitors motor winding temperature via a PTC sensor embedded in the motor stator — a standard feature on NORD IE3 motors such as the NORD SK 80L/4 BRE5. For installations in dusty or corrosive atmospheres, the drive’s control board can be ordered with a conformal coating option, and the enclosure should be mounted inside a NORD NORDAC LINK SK 250E field distributor or a sealed steel control cabinet with filtered ventilation. Surge protection on the 24 V DC control supply — typically sourced from a PHOENIX CONTACT QUINT-PS/1AC/24DC/10 power supply or equivalent — prevents transient damage to the drive’s logic board in environments with frequent switching operations.

Application in Critical Infrastructure

The SK700E-112-340-A-GBB-BY is deployed across a wide range of critical infrastructure sectors where motor drive reliability directly impacts process safety and production continuity.

In oil and gas upstream facilities, this drive controls injection pump motors and wellhead compressor auxiliaries operating in Zone 2 classified areas. While the drive itself is installed in a purged and pressurized Ex-p enclosure outside the hazardous zone, its precise speed regulation ensures stable flow rates and prevents pressure surges that could trigger safety instrumented system (SIS) shutdowns. The integrated bypass function allows maintenance teams to switch the motor to direct-on-line operation during drive inspection without interrupting the process.

In municipal and industrial water treatment plants, the SK700E manages aeration blower motors and sludge pump drives operating 24/7 in high-humidity, chemically aggressive environments. The drive’s sensorless vector control mode maintains consistent torque at low speeds during startup of heavily loaded pumps, reducing mechanical stress on couplings and impellers. Remote monitoring via PROFIBUS or PROFINET allows SCADA operators to track drive load, fault history, and energy consumption from the central control room.

In metallurgical and steel processing plants, the drive is used on rolling mill auxiliary drives, cooling fan motors, and hydraulic pump units where ambient temperatures regularly exceed 40 °C and airborne metal dust creates severe contamination risks. The SK700E’s sealed power module and conformal-coated control board maintain reliable operation between scheduled maintenance intervals, reducing unplanned downtime on production lines where a single drive failure can halt an entire casting sequence.

In mining operations, the drive controls conveyor belt motors and ventilation fan drives in underground environments characterized by high vibration, coal dust, and wide temperature swings. The IEC 60068-2-6 vibration rating and wide input voltage tolerance ensure stable operation even when the mine’s local generator supply fluctuates during load changes.

Security & Quality FAQ

Q1: What does the 12-month warranty cover, and how is a warranty claim processed?
The 12-month warranty covers all manufacturing defects and functional failures under normal operating conditions from the date of shipment. If a unit fails within the warranty period, TOPNLMS will arrange replacement or repair after receiving the defective unit and verifying the fault. Warranty claims are processed via email at [email protected] with the order number and a brief fault description. Typical replacement lead time is 5–10 business days depending on stock availability.

Q2: How is each unit tested before shipment?
Every SK700E-112-340-A-GBB-BY unit dispatched from TOPNLMS undergoes a pre-shipment functional inspection that includes power-on verification, output voltage balance check across all three phases, and parameter readout confirmation. Units sourced from authorized distribution channels are accompanied by original NORD Drivesystems documentation. Packaging is reinforced with anti-static foam and moisture-barrier film to protect the unit during international transit.

Q3: Is this drive compatible with my existing NORDAC SK700E installation, and can it replace an older SK700E unit?
Yes. The SK700E-112-340-A-GBB-BY is a direct form-fit-function replacement for any SK700E unit of the same power rating and voltage class. The mounting footprint, terminal layout, and parameter structure are consistent across the SK700E generation, meaning existing motor cables, control wiring, and fieldbus connections can be reused without modification. Parameter sets from the outgoing drive can be uploaded via NORD CON software and transferred to the replacement unit in minutes.

Q4: Can TOPNLMS guarantee long-term supply for ongoing maintenance and spare-parts programs?
TOPNLMS maintains a dedicated inventory of NORD Drivesystems products including the SK700E series to support customers with planned maintenance schedules and emergency spare-parts requirements. For customers managing large installed bases, we offer reserved stock arrangements and priority dispatch agreements. Contact our technical sales team at [email protected] or +86 18359293191 to discuss volume pricing, consignment stock, or long-term supply contracts.