NERM Series 20-100 KVA Three-Phase Modular / Redundant True Online UPS Systems

NERM Series 20-100 KVA Three-Phase Modular / Redundant True Online UPS Systems

  • High Input Power Factor (>0.99) With Low Input THD-i (<3%)
  • Adaptability For Linear and Non Linear Load
  • Low Audible Noise System Design (<55db)
  • Double DSP Controller For Each Individual Power Module
  • Digital Control For All Major UPS Subassemblies Including Rectifier, Inverter, Battery Charger, and Battery Discharge
  • IGBT Modules Rather Than Discrete Semiconductor Components Are Used In the Power Module For High Reliability
  • Conformal Coated Boards For Humidity Resistance
  • Available PDU With Circuit Breakers and MS Connectors
  • Built In Circuit Breakers For Cabinet AC Input, AC Output and Maintenance Bypass
  • Digital Paralleling Technology With Very Low Circulating Current Between Power Modules
  • Front Access Cabinet With Both Top and Bottom Cable Connections
  • Each Individual Module Is Configured With An Independent DSP Controller To Avoid Single Point Of Failure Risk
  • Generator-Friendly Interface
  • RS232, 485, and Dry Contacts All Standard
  • SNMP Available
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Description

Nova Electric’s Rugged NERM-Series True Online UPS provides a modular backup solution for rugged military data centers, computer systems, and any other critical equipment which demands dependable backup power in harsh environment applications. The NERM’s state of the art design combines the latest IGBT three-level technology along with modern DSP Control for maximum reliability, low THD-i, and extremely high system efficiency. Modules can be stacked from 20 KVA to 100 KVA, offering hot-swappable flexibility with the highest quality. Power expansion is very simple to achieve by adding more individual power modules to the system, which can reach 100 KVA power. Two racks can be paralleled to reach 200 KVA power. These units are the ideal choice for:

  • Shipboard
  • Shelter Mounted
  • Carrier Based Systems
  • High Shock Applications (With Shock Mounts)
  • Mobile Data Centers

MODULAR HOT SWAP N+X DESIGN

Each UPS power module is designed to be hot swappable for hassle-free power expansion and system maintenance. Each module is controlled independently, thus avoiding a single point failure risk. If any individual module fails or disconnects, the system continues to operate and supply power without interruption, ensuring a high level of reliability and protection.

EASY OPERATION AND INSTALLATION

The modular flexibility of the NERM-Series UPS dramatically reduces technician time spent on installation and maintenance. A large touchscreen LCD panel ensures that users can quickly and easily access vital information.

INTELLIGENT BATTERY MANAGEMENT

Each UPS module contains a powerful 3.2 KW battery charger, and up to 4 modules can be paralleled for 12.8 KW maximum battery charging capacity. These chargers are DSP
controlled with intelligent digital algorithms designed specifically to prolong battery life.

SMART PROTECTION SYSTEM

Each individual power module and the overall system are protected by both hardware and software. Protection functions include abnormal current, incorrect input or output voltage, over temperature, and short circuit. The combination of these hardware and software protection functions results in extremely high reliability, with a very user friendly interface.

HIGH RELIABILITY DESIGN

The low-loss integrated three-level IGBTs used in each NERM-Series power module result in higher efficiency and enhanced reliability due to lower heatsink temperatures.

ROBUST CABINETS

All cabinets within this system are rugged and when shock mounted will pass the barge test specified in MIL-S-901D, as well as shock and vibration called out in MIL-STD-810F, and MIL-STD-167-1 vibration.

EMI / INPUT RF

These units contain input Power Factor Control which allows very low input THD-i, along with high PF at the input. NERM UPS can meet MIL-STD-461 EMI requirements optionally, along with MIL-STD-1399 for input THD-i, phase balance, and other relevant characteristics.

MODULE FEATURES

Hot swap building block 20 KVA modules @ 120/208 VAC
• Independent control
• Designed for parallel operation with active current sharing
• Designed for (N+1) redundancy
• Capable of hot swap
• Automatic mechanical disconnection in case of failure or maintenance

TRANSFORMER ISOLATION AND MANUAL BYPASS

An optional cabinet which provides for input and output isolation is required for any voltage without a neutral. This cabinet may also be used for applications with a neutral where
complete Input / Output isolation is desired. This cabinet can also contain a mechanical rotary manual bypass switch used to isolate the UPS electronics enclosure for safe service while maintaining power to the load. When manual bypass is used, customer AC Input / Output will be made to this cabinet. This cabinet will also contain an input circuit breaker and EMI filtering when MIL-STD-461 requirements are specified. An output PDU may be included in this enclosure. We can provide an array of output distribution with various customer specified MS connectors.

BATTERY CABINET

The system batteries may be housed in a separate (matching) enclosure with a protective circuit breaker, or separate racks depending on run time desired. When the batteries are housed inside the matching enclosure, multiple strings will be used in parallel for highest redundancy. The batteries may be drawer mounted or on rails within the enclosure.

Partial Model Selection
MODEL KVAKWINPUT / OUTPUT (VAC)UPS CABINET DIMENSIONS (WxDxH)BATTERY CABINET DIMENSIONS (HxWxD)RUN TIME AT FULL LOADTRANSFORMER CABINET DIMENSIONS 
NERM11-20K3/6-120/208-120/2082018120/208 Input / Output23.6 x 35.5 x 63”Internal to UPS Cabinet40x 9 AH cells for 2 minutes at 18 kW load or 80x 9 AH cells for 10 minutes at 18 kW loadAvailable for applications requiring isolation and for EMI and PDU requirements QUOTE
NERM11-40K3/6-120/208-120/2084036120/208 Input / Output23.6 x 35.5 x 63”23.6 x 35.5 x 63”40x 26 AH cells for 5 minutes at 36 KW loadAvailable for applications requiring isolation and for EMI and PDU requirements QUOTE
NERM11-60K3/6-120/208-120/2086054120/208 Input / Output23.6 x 35.5 x 63”23.6 x 35.5 x 63”60x 26 AH cells for 5 minutes at 54 KW loadAvailable for applications requiring isolation and for EMI and PDU requirements QUOTE
NERM11-80K3/6-120/208-120/2088072120/208 Input / Output23.6 x 35.5 x 63”Two Cabinets Needed - Each Cabinet is 23.6 x 35.5 x 63”80x 26 AH cells for 5 minutes at 72 KW loadAvailable for applications requiring isolation and for EMI and PDU requirements QUOTE
NERM11-100K3/6-120/208-120/20810090120/208 Input / Output23.6 x 35.5 x 63”Two Cabinets Needed - Each Cabinet is 23.6 x 35.5 x 63”100x 26 AH cells for 5 minutes at 90 KW loadAvailable for applications requiring isolation and for EMI and PDU requirements QUOTE
NERM11-20K3/6-450(D)-120/2082018450 Delta Input / 120/208 Wye Output23.6 x 35.5 x 63”Internal to UPS Cabinet40x 9 AH cells for 2 minutes at 18 kW load or 80x 9 AH cells for 10 minutes at 18 kW load23.6 x 35.5 x 63” QUOTE
NERM11-40K3/6-450(D)-120/2084036450 Delta Input / 120/208 Wye Output23.6 x 35.5 x 63”23.6 x 35.5 x 63”40x 26 AH cells for 5 minutes at 36 KW load23.6 x 35.5 x 63” QUOTE
NERM11-60K3/6-450(D)-120/2086054450 Delta Input / 120/208 Wye Output23.6 x 35.5 x 63”23.6 x 35.5 x 63”60x 26 AH cells for 5 minutes at 54 KW load23.6 x 35.5 x 63” QUOTE
NERM11-80K3/6-450(D)-120/2088072450 Delta Input / 120/208 Wye Output23.6 x 35.5 x 63”Two Cabinets Needed - Each Cabinet is 23.6 x 35.5 x 63”80x 26 AH cells for 5 minutes at 72 KW load23.6 x 35.5 x 63” QUOTE
NERM11-100K3/6-450(D)-120/20810090450 Delta Input / 120/208 Wye Output23.6 x 35.5 x 63”Two Cabinets Needed - Each Cabinet is 23.6 x 35.5 x 63”100x 26 AH cells for 5 minutes at 90 KW load23.6 x 35.5 x 63” QUOTE

All models shown available with N+X where X = the number of modules in redundancy. 100 kVA models can only have N+1. Shorter and longer battery run times on most models are available upon request.

CABINET SIZE* ( W X D X H) WEIGHT – ESTIMATE (LBS)
UPS CABINET (CAN FIT UP TO 6 MODULES) 23.6” x 35.5” x 63″ 600 lbs
(4 Modules)
BATTERY CABINET 23.6” x 35.5” x 63″ 800 – 1500 lbs
(Depends on Battery Selected)
TRANSFORMER, MANUAL BYPASS, AND PDU CABINET 23.6” x 35.5” x 63″ 1500 lbs
(60 KVA Model)
*Add ~8” to Height and Depth when Shock Mounts are Used (Mounts Add Significant Weight )
CAPACITY 20-100 KVA (18 – 90 KW)
MAIN INPUT
INPUT VOLTAGE (W/NEUTRAL) 120/208 VAC or 450 VAC DELTA (with Optional Transformer) – Other voltages available optionally
INPUT FREQUENCY 60 Hz (50 Hz Available)
INPUT POWER FACTOR > 0.99 at ½ Load to Full Load
INPUT CURRENT THD (AT NOMINAL VOLTAGE) < 3% at ½ to ¾ Load
INPUT VOLTAGE WINDOW -20% to +20% @ Full Load, -40% to +20% @ 70% Load or Less
FREQUENCY WINDOW 40-70 Hz Programmable
BATTERY
BATTERY VOLTAGE ± 120 VDC (Nominal)
CHARGER POWER 20%  of UPS KW Power Rating
CHARGER VOLTAGE PRECISION 1%
BYPASS
BYPASS VOLTAGE Same as Input Voltage (see above)
BYPASS VOLTAGE WINDOW -20% ~ +15%, Full Load, Settable
BYPASS OVERLOAD CAPACITY
(PLEASE ADVISE US OF ANY INTENDED MOTORS
IN THE LOAD)
< 125%, Long Term Operation (2 Hours Maximum)
125% < load < 130%, for More than 1 Hour
130% < load < 150%, for More than 6 Minutes
> 1000%, for More than 100ms
OUTPUT
OUTPUT VOLTAGE 120/208 VAC or 450 VAC DELTA (with Optional Transformer) – Other voltages available optionally
VOLTAGE PRECISION ± 1.5% (Balanced Load), ± 3% (Unbalanced Load)
VOLTAGE THD THD < 2% (Linear Load), THD <5% (Nonlinear Load)
POWER FACTOR 0.8 Lead to Lag
PHASE TOLERANCE 120° ± 0.5° (Balanced and Unbalanced Load)
CREST FACTOR 3:1
OVERLOAD CAPABILITY Up to 105%, Continuous Operation
Up to 110%, Transfer to Bypass after 1 Hour
Up to 125%, Transfer to Bypass after 10 Minutes
Up to 150%, Transfer to Bypass after 1 Minute
> 150%, Transfer to Bypass after 200 ms
SYSTEM
SYSTEM EFFICIENCY Normal Mode: 90% (~89% with Transformers)
ECO Mode: 99%
BATTERY MODE EFFICIENCY 90%
DISPLAY LCD+LED, Touch Screen and Keyboard
IP CLASS IP20 Standard – Higher IP Ratings / Drip Shield Available Optionally
INTERFACE (COMMUNICATION PORTS) RS232, RS485, Dry Contacts, SNMP Card, EPO, Generator Interface
INSTALLATION/CONNECTION Top or Bottom Cable Connection (Custom Available)
OPERATION TEMPERATURE 0-40°C (to 50°C with 15% Derating)
STORAGE TEMPERATURE (ELECTRONICS) -25°C TO +70°C (Depends on Battery Rating)
RELATIVE HUMIDITY 0-95% (Non-Condensing)
NOISE (dBa) < 55 dBa at 5 Feet

OPTIONS

  • VRLA Batteries in Modular Drawers
  • VRLA Batteries in a Separate Matching Cabinet or in an Open Rack
  • Battery Circuit Breaker
  • SNMP Communication Card
  • Battery Temperature Compensation Module
  • User Replaceable Air Filter for Dusty Environments
  • Parallel Operation Kit
  • Input Isolation Transformer
  • Alternate Remote Shutdown / EPO Configurations
  • Battery Cold Start Module (Allows the UPS to Start on Battery Alone)
  • Input Surge Supression Module

Select models in the NERM product family were formally tested and qualified as follows:

  • MIL-S-901D Barge Test
  • MIL-STD-810F Humidity, Shock, and Vibration
  • MIL-STD-167-1 Shipboard Vibration
  • MIL-STD-461 EMI
  • MIL-STD-1399 Shipboard Power Characteristics

Formal Qual Testing to these and other standards is available optionally.

NERM Series 20-100 KVA Data Sheet

NERM Series 20-100 KVA Outline Drawing

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