NT series introduction UPS training June 2006 Markus Schwab

E n er gy S ystem s

NT series introductionUPS training June 2006

Markus Schwab

© 2023年4月18日 Delta Energy Systems 2

E n er gy S ystem s NT-series UPS Introduction

Features: Online double conversion UPS

20-200kVA models

Very compact size to save floorspace

Up to 4 units parallelable for capacity or redundancy

Very wide input voltage range for fewer switching to battery and longer battery life

100% unbalanced and computer load suitability

Redundant auxiliary power and redundant static switch control

Intelligent charger design to extend battery lifetime

Hot-Standby function is available

Reduced charger capacity when run from generator source

Soft start to smoothly load a generator


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Features: User-friendly graphic LCD display

Programmable status dry contacts

RS232 & RS485 communication ports

Optional SNMP interface

Local and remote Emergency Power Off ( EPO ) function

Multi-CPU digital control to minimize the number of components

Intelligent Multi-Speed cooling fan control (less dust and noise, longer life)

Manual & scheduled battery test and battery replacement warning

Built-in SRAM saves up to 500 historical records and event logs

Smart software package with 3-phase functions included


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Optional features: 12-Pulse rectifier to reduce input current distortion

Single phase output models (20 and 30kVA)

Output transformers for special voltage ratings

Battery Start Function


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NT-Series 20kVA - 200kVA

General data:

Technology: On-Line

Input / Output: 3-phase / 3-phase

Cabinet type: Tower

Rating: 20, 30, 40, 50, 60, 80100, 120 , 160, 200kVA

Input nominal: 3-phase 380//400/415VAC

Input range: 305 - 499VAC

Input power factor: >0,75

Input frequency: 50/60Hz (auto-selectable)

Output voltage: 3-phase: 380/400/415V1-phase: 220/230/240VAC

Output power factor: 0,8

Output waveform: Pure sine wave

Overload: < 110% - 60 min.< 125% - 10 min.< 150% - 30 sec.


E n er gy S ystem s

NT-Series 20kVA - 200kVA

Temperature range: 0°C - 40°C

Audible noise: 65dBA

Crest factor: 3:1

Input current THD: 6-pulse (standard) 34%12-pulse (optional) 14%

Software: UPSentry included

Battery

Battery: External 29 x 12V

Communication

Front: Graphical Interface with LED indicators

Interface1: RS232 (D-Sub Connector)

Interface 2: SNMP card (optional)

Interface 3: RS485


E n er gy S ystem sStandards

CE approval

EMC EN50091-2 Class A for restricted use IEC62040-2 Class C3

Safety IEC62040-1-2 Restricted access UPS systems ESD IEC 1000-4-2 Level 4 Contact: 8KV Air: 15KV

RS IEC 1000-4-3 Level 3 Field strength: 10V/M

EFT IEC 1000-4-4 Level 4 AC Port: 4KV I/O Port: 2KV

Surge IEC 1000-4-5 Level 4 Input Port: 4KV

CS IEC 1000-4-6 Level 3 Strength: 10Vrms


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UPS configurations


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1 2 3 4

A

B

C

D

4321

D

C

B

A

Load

BY PASS

RESERVE

RECTIFIER

OUTPUT

STATIC SWITCH

INVERTER

BATTERY

RECTIFIER

Single unit configuration


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1 2 3 4

A

B

C

D

4321

D

C

B

A

Load

UPS 1

UPS 2

Parallel configuration

Same bypass

mains

Load

Mains 1

Mains 2


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1 2 3 4

A

B

C

D

4321

D

C

B

A

Load

UPS 1

UPS 2

Hot standby


E n er gy S ystem sCommon Battery

1 2 3 4

A

B

C

D

4321

D

C

B

A

Load

UPS 1

UPS 2

Note: For capacity increase only, not for n+1 redundancy


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Hot-Standby ( Common Battery )

1 2 3 4

A

B

C

D

4321

D

C

B

A

Load

UPS 1

UPS 2


E n er gy S ystem sRedundant auxiliary supply

When one DC/DC converter fails, the UPS still normally supplies the load and alarms.


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1. EPO switch

2. Rectifier ok

3. Reserve input ok

4. Maintenance bypass on

5. Load on battery

6. Inverter operating

7. Load on reserve

8. Output ok

9. Load on inverter

10. Inverter On/Off (with for 3sec. )

11. Display navigation

12. LCD screen

Control panel


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Advantages of parallel operation: Enhance system reliability (redundancy) Increase power rating Easy capacity extension (on site) Cost advantage (do expansion when needed only)

Parallel operation


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100%

50% 50%

66% 66% 66%

75% 75% 75% 75%

N + 1 Redundancy

+ ++

Capacity for

n+1 redundancy


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UPS-1UPS-1-

UPS-2UPS-2-

UPS-NUPS-N-

I1

I2

IN

VL

LoadLoad

-

-

I1

I2

IN

VL

Load sharing ( 3%) Precise voltage

regulation ( 1% )CommunicationEvery unit can be

master Fault isolation

Requirement of UPS Parallel Operation


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O/P CharacteristicCondition: AC MODE O/P FULL R LOAD

CH1: R Phase O/P Voltage 100V/DIV

CH2: S Phase O/P Voltage 100V/DIV

CH3: T Phase O/P Voltage 100V/DIV

CH4: R Phase O/P Current 200A/DIV

Parallel Test Waveform (1)

Measurements taken with four sets 80kVA in parallel


E n er gy S ystem s

O/P CharacteristicCondition: ON LINE MODEI/P: 600KW Generator SourceO/P: 75% R LOAD

CH1: R Phase I/P Voltage 100V/DIV


CH3: R Phase I/P Current 200A/DIV




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Transfer time TestCondition: Inverter Bypass O/P FULL R LOAD







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Transfer time TestCondition: Main Power Failure AC Backup Mode O/P FULL R LOAD







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O/P SHORT CIRCUITCONDITION: Backup Mode(T PhaseN)FULL R LOAD

CH1: UPS1 O/P Current 200A/DIV CH2: UPS2 O/P Current 200A/DIV

CH3: UPS3 O/P Current 200A/DIV

CH4: UPS4 O/P Current 200A/DIV

At short circuit in AC mode the UPS will switch to bypass to blow the load fuse faster



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Rectifier Soft StartI/P: 600KW Generator SourceO/P: 75% LOAD







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Load Sharing Test, load stepCondition: ON LINE MODEI/P: 600KW Generator SourceO/P: R LOAD (0%100%)

CH1: UPS1 R Phase O/P Current 50A/DIV






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Load Sharing TestCondition: ON LINE MODEI/P: 600KW Generator SourceO/P: R LOAD (0%50%100%0%)







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LOAD STEPCONDITION: Nominal LineR LOAD (100%0%)







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LOAD STEPCONDITION: Nominal LineR LOAD (0%100%)







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Phase Shift Method ( 12-PULSE Rectifier )

Active Filter (in development)

UPS Input Harmonic Improve Methods


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100 KVA UPS

Volts = 223.6 Vac

Amps = 173.9A

PF = 0.765

A thd = 11.54%

AH05 = 1.700%

AH07 = 1.099%

AH011= 8.236%

AH013 = 1.894%

12 - Pulse Rectifier Input Current Waveform


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+

-

+

-

S1

S2

S3

S4

S5

S6

vSa vSb vSc

iSaiSbiSc

iLaiLbiLc

iAPFaiAPFbiAPFc

Block diagram of active filter


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I / P THD=2.9%I / P THD=2.9%

vvSaSa

iiLaLa

iiAPFaAPFa

iiSaSa

I / P THD=2.9%I / P THD=2.9%

vvSaSa

iiLaLa

iiAPFaAPFa

iiSaSa

Current waveform with active filter


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6-Pulse and 12-Pulse Harmonic Curve


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Generally speaking:

If the UPS rectifier is 6-PULSE configuration, then the generator capacity must be 2 times of the UPS capacity.

If the UPS rectifier is 12-PULSE configuration, then the generator capacity must be 1.5 times of the UPS capacity.

Generator CapacityGenerator Capacity


E n er gy S ystem s

Battery Management System

BatteryManagement

System

Battery voltage Battery currentBattery parameterLoad conditionUser settings

Battery Charge VoltageBattery Test ResultBattery CapacityBattery Remaining TimeBattery Low WarningBattery Leakage Warning Battery Installation dateBattery Next replacement dateBattery Replace Warning


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0 ~ T1 : constant current charge

T1 ~ T2 : constant voltage charge -> automatic boost charge

T2 ~ : constant voltage charge -> float charge

Parameters can be set by the user

Battery charging method


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0 ~ T1 : battery floated

T1 : start battery test -> manually -> scheduled

T1 ~ T2 : discharge time

T2 : finish discharge test, battery return to floated

If the battery voltage is lower than the test voltage, the test is stopped and an alarm is generated

Battery test


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Battery Ground Fault Detect

The battery ground will be connected to separate ground terminal at the UPS, large currents to ground can be detected.


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Width (mm) Depth (mm) Height (mm)600 800 1400800 830 1700

1200 830 1700

Battery(AH) Width (mm) Depth (mm) Height (mm)

NT BBU 1 40 1 600 800 1400NT BBU 2 40 1 600 800 1700NT BBU 3 40 2 900 800 1700NT BBU 4 100 1 970 800 1700

Every battery string with 29 pieces 12V batteries in series.

DimensionKVA

100/120160/200

NT Cabinet

DimensionBatterystring

NT Battery Cabinet

20/30/40/50/60/80

NT dimensions


E n er gy S ystem s NT series Runtime table

Example: 60KVA 30 min – NT BBU1*4 (40AH*4>152AH)

100KVA 30 min – NT BBU4*3 (100AH*3> 250AH)

KVA TIME 10mins 15mins 30mins 1Hour 2Hours 4Hours 8Hours

20KVA 25 34 51 85 151 279 484

30KVA 37 51 77 128 226 419 727

40KVA 48 68 101 169 299 552 958

50KVA 60 85 127 211 373 690 1198

60KVA 72 101 152 254 448 828 1437

80KVA 96 134 200 345 591 1093 1895

100KVA 120 167 250 418 739 1366 2369

120KVA 144 200 301 502 886 1639 2843

160KVA 192 268 401 669 1182 2185 3790

200KVA 240 334 502 836 1477 2731 4738

UNIT : AH


E n er gy S ystem s Thermal simulationScalar Show Vector Show

Unit=ft/min

T max LI1=117 0C

X

Y

Z


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1

Dynamic Animation Display (100X Displacements)

U2

U3

U1

Seismic Simulation for UPS 60K- Vibration in Z Direction and Response Deflections


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1

Seismic Simulation for UPS 60K- Vibration in Z Direction and Response Deflections

(5X Displacements)

(Green color mesh is the original shape of structure)


E n er gy S ystem s

Thanks

Documents

NT series introduction UPS training June 2006 Markus Schwab